21728520

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:121

約数の個数: 256

約数和(自身を含む): 82944000

約数和(自身を除く): 61215480

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 27, 30, 31, 33, 36, 40, 44, 45, 54, 55, 59, 60, 62, 66, 72, 88, 90, 93, 99, 108, 110, 118, 120, 124, 132, 135, 155, 165, 177, 180, 186, 198, 216, 220, 236, 248, 264, 270, 279, 295, 297, 310, 330, 341, 354, 360, 372, 396, 440, 465, 472, 495, 531, 540, 558, 590, 594, 620, 649, 660, 682, 708, 744, 792, 837, 885, 930, 990, 1023, 1062, 1080, 1116, 1180, 1188, 1240, 1298, 1320, 1364, 1395, 1416, 1485, 1593, 1674, 1705, 1770, 1829, 1860, 1947, 1980, 2046, 2124, 2232, 2360, 2376, 2596, 2655, 2728, 2790, 2970, 3069, 3186, 3245, 3348, 3410, 3540, 3658, 3720, 3894, 3960, 4092, 4185, 4248, 5115, 5192, 5310, 5487, 5580, 5841, 5940, 6138, 6372, 6490, 6696, 6820, 7080, 7316, 7788, 7965, 8184, 8370, 9145, 9207, 9735, 10230, 10620, 10974, 11160, 11682, 11880, 12276, 12744, 12980, 13640, 14632, 15345, 15576, 15930, 16461, 16740, 17523, 18290, 18414, 19470, 20119, 20460, 21240, 21948, 23364, 24552, 25960, 27435, 29205, 30690, 31860, 32922, 33480, 35046, 36580, 36828, 38940, 40238, 40920, 43896, 46035, 46728, 49383, 54870, 58410, 60357, 61380, 63720, 65844, 70092, 73160, 73656, 77880, 80476, 82305, 87615, 92070, 98766, 100595, 109740, 116820, 120714, 122760, 131688, 140184, 160952, 164610, 175230, 181071, 184140, 197532, 201190, 219480, 233640, 241428, 246915, 301785, 329220, 350460, 362142, 368280, 395064, 402380, 482856, 493830, 543213, 603570, 658440, 700920, 724284, 804760, 905355, 987660, 1086426, 1207140, 1448568, 1810710, 1975320, 2172852, 2414280, 2716065, 3621420, 4345704, 5432130, 7242840, 10864260, 21728520]

約数ペア:

[(1, 21728520), (2, 10864260), (3, 7242840), (4, 5432130), (5, 4345704), (6, 3621420), (8, 2716065), (9, 2414280), (10, 2172852), (11, 1975320), (12, 1810710), (15, 1448568), (18, 1207140), (20, 1086426), (22, 987660), (24, 905355), (27, 804760), (30, 724284), (31, 700920), (33, 658440), (36, 603570), (40, 543213), (44, 493830), (45, 482856), (54, 402380), (55, 395064), (59, 368280), (60, 362142), (62, 350460), (66, 329220), (72, 301785), (88, 246915), (90, 241428), (93, 233640), (99, 219480), (108, 201190), (110, 197532), (118, 184140), (120, 181071), (124, 175230), (132, 164610), (135, 160952), (155, 140184), (165, 131688), (177, 122760), (180, 120714), (186, 116820), (198, 109740), (216, 100595), (220, 98766), (236, 92070), (248, 87615), (264, 82305), (270, 80476), (279, 77880), (295, 73656), (297, 73160), (310, 70092), (330, 65844), (341, 63720), (354, 61380), (360, 60357), (372, 58410), (396, 54870), (440, 49383), (465, 46728), (472, 46035), (495, 43896), (531, 40920), (540, 40238), (558, 38940), (590, 36828), (594, 36580), (620, 35046), (649, 33480), (660, 32922), (682, 31860), (708, 30690), (744, 29205), (792, 27435), (837, 25960), (885, 24552), (930, 23364), (990, 21948), (1023, 21240), (1062, 20460), (1080, 20119), (1116, 19470), (1180, 18414), (1188, 18290), (1240, 17523), (1298, 16740), (1320, 16461), (1364, 15930), (1395, 15576), (1416, 15345), (1485, 14632), (1593, 13640), (1674, 12980), (1705, 12744), (1770, 12276), (1829, 11880), (1860, 11682), (1947, 11160), (1980, 10974), (2046, 10620), (2124, 10230), (2232, 9735), (2360, 9207), (2376, 9145), (2596, 8370), (2655, 8184), (2728, 7965), (2790, 7788), (2970, 7316), (3069, 7080), (3186, 6820), (3245, 6696), (3348, 6490), (3410, 6372), (3540, 6138), (3658, 5940), (3720, 5841), (3894, 5580), (3960, 5487), (4092, 5310), (4185, 5192), (4248, 5115)]