21081840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{233}}^1$

素因数の和:291

約数の個数: 160

約数和(自身を含む): 73120320

約数和(自身を除く): 52038480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 29, 30, 39, 40, 48, 52, 58, 60, 65, 78, 80, 87, 104, 116, 120, 130, 145, 156, 174, 195, 208, 232, 233, 240, 260, 290, 312, 348, 377, 390, 435, 464, 466, 520, 580, 624, 696, 699, 754, 780, 870, 932, 1040, 1131, 1160, 1165, 1392, 1398, 1508, 1560, 1740, 1864, 1885, 2262, 2320, 2330, 2796, 3016, 3029, 3120, 3480, 3495, 3728, 3770, 4524, 4660, 5592, 5655, 6032, 6058, 6757, 6960, 6990, 7540, 9048, 9087, 9320, 11184, 11310, 12116, 13514, 13980, 15080, 15145, 18096, 18174, 18640, 20271, 22620, 24232, 27028, 27960, 30160, 30290, 33785, 36348, 40542, 45240, 45435, 48464, 54056, 55920, 60580, 67570, 72696, 81084, 87841, 90480, 90870, 101355, 108112, 121160, 135140, 145392, 162168, 175682, 181740, 202710, 242320, 263523, 270280, 324336, 351364, 363480, 405420, 439205, 527046, 540560, 702728, 726960, 810840, 878410, 1054092, 1317615, 1405456, 1621680, 1756820, 2108184, 2635230, 3513640, 4216368, 5270460, 7027280, 10540920, 21081840]

約数ペア:

[(1, 21081840), (2, 10540920), (3, 7027280), (4, 5270460), (5, 4216368), (6, 3513640), (8, 2635230), (10, 2108184), (12, 1756820), (13, 1621680), (15, 1405456), (16, 1317615), (20, 1054092), (24, 878410), (26, 810840), (29, 726960), (30, 702728), (39, 540560), (40, 527046), (48, 439205), (52, 405420), (58, 363480), (60, 351364), (65, 324336), (78, 270280), (80, 263523), (87, 242320), (104, 202710), (116, 181740), (120, 175682), (130, 162168), (145, 145392), (156, 135140), (174, 121160), (195, 108112), (208, 101355), (232, 90870), (233, 90480), (240, 87841), (260, 81084), (290, 72696), (312, 67570), (348, 60580), (377, 55920), (390, 54056), (435, 48464), (464, 45435), (466, 45240), (520, 40542), (580, 36348), (624, 33785), (696, 30290), (699, 30160), (754, 27960), (780, 27028), (870, 24232), (932, 22620), (1040, 20271), (1131, 18640), (1160, 18174), (1165, 18096), (1392, 15145), (1398, 15080), (1508, 13980), (1560, 13514), (1740, 12116), (1864, 11310), (1885, 11184), (2262, 9320), (2320, 9087), (2330, 9048), (2796, 7540), (3016, 6990), (3029, 6960), (3120, 6757), (3480, 6058), (3495, 6032), (3728, 5655), (3770, 5592), (4524, 4660)]