21279240

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1$

素因数の和:117

約数の個数: 256

約数和(自身を含む): 80352000

約数和(自身を除く): 59072760

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, 61, 68, 72, 76, 85, 90, 95, 102, 108, 114, 120, 122, 135, 136, 152, 153, 170, 171, 180, 183, 190, 204, 216, 228, 244, 255, 270, 285, 305, 306, 323, 340, 342, 360, 366, 380, 408, 456, 459, 488, 510, 513, 540, 549, 570, 610, 612, 646, 680, 684, 732, 760, 765, 855, 915, 918, 969, 1020, 1026, 1037, 1080, 1098, 1140, 1159, 1220, 1224, 1292, 1368, 1464, 1530, 1615, 1647, 1710, 1830, 1836, 1938, 2040, 2052, 2074, 2196, 2280, 2295, 2318, 2440, 2565, 2584, 2745, 2907, 3060, 3111, 3230, 3294, 3420, 3477, 3660, 3672, 3876, 4104, 4148, 4392, 4590, 4636, 4845, 5130, 5185, 5490, 5795, 5814, 6120, 6222, 6460, 6588, 6840, 6954, 7320, 7752, 8235, 8296, 8721, 9180, 9272, 9333, 9690, 10260, 10370, 10431, 10980, 11590, 11628, 12444, 12920, 13176, 13908, 14535, 15555, 16470, 17385, 17442, 18360, 18666, 19380, 19703, 20520, 20740, 20862, 21960, 23180, 23256, 24888, 27816, 27999, 29070, 31110, 31293, 32940, 34770, 34884, 37332, 38760, 39406, 41480, 41724, 43605, 46360, 46665, 52155, 55998, 58140, 59109, 62220, 62586, 65880, 69540, 69768, 74664, 78812, 83448, 87210, 93330, 98515, 104310, 111996, 116280, 118218, 124440, 125172, 139080, 139995, 156465, 157624, 174420, 177327, 186660, 197030, 208620, 223992, 236436, 250344, 279990, 295545, 312930, 348840, 354654, 373320, 394060, 417240, 472872, 531981, 559980, 591090, 625860, 709308, 788120, 886635, 1063962, 1119960, 1182180, 1251720, 1418616, 1773270, 2127924, 2364360, 2659905, 3546540, 4255848, 5319810, 7093080, 10639620, 21279240]

約数ペア:

[(1, 21279240), (2, 10639620), (3, 7093080), (4, 5319810), (5, 4255848), (6, 3546540), (8, 2659905), (9, 2364360), (10, 2127924), (12, 1773270), (15, 1418616), (17, 1251720), (18, 1182180), (19, 1119960), (20, 1063962), (24, 886635), (27, 788120), (30, 709308), (34, 625860), (36, 591090), (38, 559980), (40, 531981), (45, 472872), (51, 417240), (54, 394060), (57, 373320), (60, 354654), (61, 348840), (68, 312930), (72, 295545), (76, 279990), (85, 250344), (90, 236436), (95, 223992), (102, 208620), (108, 197030), (114, 186660), (120, 177327), (122, 174420), (135, 157624), (136, 156465), (152, 139995), (153, 139080), (170, 125172), (171, 124440), (180, 118218), (183, 116280), (190, 111996), (204, 104310), (216, 98515), (228, 93330), (244, 87210), (255, 83448), (270, 78812), (285, 74664), (305, 69768), (306, 69540), (323, 65880), (340, 62586), (342, 62220), (360, 59109), (366, 58140), (380, 55998), (408, 52155), (456, 46665), (459, 46360), (488, 43605), (510, 41724), (513, 41480), (540, 39406), (549, 38760), (570, 37332), (610, 34884), (612, 34770), (646, 32940), (680, 31293), (684, 31110), (732, 29070), (760, 27999), (765, 27816), (855, 24888), (915, 23256), (918, 23180), (969, 21960), (1020, 20862), (1026, 20740), (1037, 20520), (1080, 19703), (1098, 19380), (1140, 18666), (1159, 18360), (1220, 17442), (1224, 17385), (1292, 16470), (1368, 15555), (1464, 14535), (1530, 13908), (1615, 13176), (1647, 12920), (1710, 12444), (1830, 11628), (1836, 11590), (1938, 10980), (2040, 10431), (2052, 10370), (2074, 10260), (2196, 9690), (2280, 9333), (2295, 9272), (2318, 9180), (2440, 8721), (2565, 8296), (2584, 8235), (2745, 7752), (2907, 7320), (3060, 6954), (3111, 6840), (3230, 6588), (3294, 6460), (3420, 6222), (3477, 6120), (3660, 5814), (3672, 5795), (3876, 5490), (4104, 5185), (4148, 5130), (4392, 4845), (4590, 4636)]