81279720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:289

約数の個数: 256

約数和(自身を含む): 303264000

約数和(自身を除く): 221984280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 17, 18, 19, 20, 24, 27, 30, 34, 36, 38, 40, 45, 51, 54, 57, 60, 68, 72, 76, 85, 90, 95, 102, 108, 114, 120, 135, 136, 152, 153, 170, 171, 180, 190, 204, 216, 228, 233, 255, 270, 285, 306, 323, 340, 342, 360, 380, 408, 456, 459, 466, 510, 513, 540, 570, 612, 646, 680, 684, 699, 760, 765, 855, 918, 932, 969, 1020, 1026, 1080, 1140, 1165, 1224, 1292, 1368, 1398, 1530, 1615, 1710, 1836, 1864, 1938, 2040, 2052, 2097, 2280, 2295, 2330, 2565, 2584, 2796, 2907, 3060, 3230, 3420, 3495, 3672, 3876, 3961, 4104, 4194, 4427, 4590, 4660, 4845, 5130, 5592, 5814, 6120, 6291, 6460, 6840, 6990, 7752, 7922, 8388, 8721, 8854, 9180, 9320, 9690, 10260, 10485, 11628, 11883, 12582, 12920, 13281, 13980, 14535, 15844, 16776, 17442, 17708, 18360, 19380, 19805, 20520, 20970, 22135, 23256, 23766, 25164, 26562, 27960, 29070, 31455, 31688, 34884, 35416, 35649, 38760, 39610, 39843, 41940, 43605, 44270, 47532, 50328, 53124, 58140, 59415, 62910, 66405, 69768, 71298, 75259, 79220, 79686, 83880, 87210, 88540, 95064, 106248, 106947, 116280, 118830, 119529, 125820, 132810, 142596, 150518, 158440, 159372, 174420, 177080, 178245, 199215, 213894, 225777, 237660, 239058, 251640, 265620, 285192, 301036, 318744, 348840, 356490, 376295, 398430, 427788, 451554, 475320, 478116, 531240, 534735, 597645, 602072, 677331, 712980, 752590, 796860, 855576, 903108, 956232, 1069470, 1128885, 1195290, 1354662, 1425960, 1505180, 1593720, 1806216, 2031993, 2138940, 2257770, 2390580, 2709324, 3010360, 3386655, 4063986, 4277880, 4515540, 4781160, 5418648, 6773310, 8127972, 9031080, 10159965, 13546620, 16255944, 20319930, 27093240, 40639860, 81279720]

約数ペア:

[(1, 81279720), (2, 40639860), (3, 27093240), (4, 20319930), (5, 16255944), (6, 13546620), (8, 10159965), (9, 9031080), (10, 8127972), (12, 6773310), (15, 5418648), (17, 4781160), (18, 4515540), (19, 4277880), (20, 4063986), (24, 3386655), (27, 3010360), (30, 2709324), (34, 2390580), (36, 2257770), (38, 2138940), (40, 2031993), (45, 1806216), (51, 1593720), (54, 1505180), (57, 1425960), (60, 1354662), (68, 1195290), (72, 1128885), (76, 1069470), (85, 956232), (90, 903108), (95, 855576), (102, 796860), (108, 752590), (114, 712980), (120, 677331), (135, 602072), (136, 597645), (152, 534735), (153, 531240), (170, 478116), (171, 475320), (180, 451554), (190, 427788), (204, 398430), (216, 376295), (228, 356490), (233, 348840), (255, 318744), (270, 301036), (285, 285192), (306, 265620), (323, 251640), (340, 239058), (342, 237660), (360, 225777), (380, 213894), (408, 199215), (456, 178245), (459, 177080), (466, 174420), (510, 159372), (513, 158440), (540, 150518), (570, 142596), (612, 132810), (646, 125820), (680, 119529), (684, 118830), (699, 116280), (760, 106947), (765, 106248), (855, 95064), (918, 88540), (932, 87210), (969, 83880), (1020, 79686), (1026, 79220), (1080, 75259), (1140, 71298), (1165, 69768), (1224, 66405), (1292, 62910), (1368, 59415), (1398, 58140), (1530, 53124), (1615, 50328), (1710, 47532), (1836, 44270), (1864, 43605), (1938, 41940), (2040, 39843), (2052, 39610), (2097, 38760), (2280, 35649), (2295, 35416), (2330, 34884), (2565, 31688), (2584, 31455), (2796, 29070), (2907, 27960), (3060, 26562), (3230, 25164), (3420, 23766), (3495, 23256), (3672, 22135), (3876, 20970), (3961, 20520), (4104, 19805), (4194, 19380), (4427, 18360), (4590, 17708), (4660, 17442), (4845, 16776), (5130, 15844), (5592, 14535), (5814, 13980), (6120, 13281), (6291, 12920), (6460, 12582), (6840, 11883), (6990, 11628), (7752, 10485), (7922, 10260), (8388, 9690), (8721, 9320), (8854, 9180)]