21306840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{277}}^1\times {\mathrm{641}}^1$

素因数の和:932

約数の個数: 64

約数和(自身を含む): 64251360

約数和(自身を除く): 42944520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 277, 554, 641, 831, 1108, 1282, 1385, 1662, 1923, 2216, 2564, 2770, 3205, 3324, 3846, 4155, 5128, 5540, 6410, 6648, 7692, 8310, 9615, 11080, 12820, 15384, 16620, 19230, 25640, 33240, 38460, 76920, 177557, 355114, 532671, 710228, 887785, 1065342, 1420456, 1775570, 2130684, 2663355, 3551140, 4261368, 5326710, 7102280, 10653420, 21306840]

約数ペア:

[(1, 21306840), (2, 10653420), (3, 7102280), (4, 5326710), (5, 4261368), (6, 3551140), (8, 2663355), (10, 2130684), (12, 1775570), (15, 1420456), (20, 1065342), (24, 887785), (30, 710228), (40, 532671), (60, 355114), (120, 177557), (277, 76920), (554, 38460), (641, 33240), (831, 25640), (1108, 19230), (1282, 16620), (1385, 15384), (1662, 12820), (1923, 11080), (2216, 9615), (2564, 8310), (2770, 7692), (3205, 6648), (3324, 6410), (3846, 5540), (4155, 5128)]