21018840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2467}}^1$

素因数の和:2552

約数の個数: 64

約数和(自身を含む): 63970560

約数和(自身を除く): 42951720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 71, 120, 142, 213, 284, 355, 426, 568, 710, 852, 1065, 1420, 1704, 2130, 2467, 2840, 4260, 4934, 7401, 8520, 9868, 12335, 14802, 19736, 24670, 29604, 37005, 49340, 59208, 74010, 98680, 148020, 175157, 296040, 350314, 525471, 700628, 875785, 1050942, 1401256, 1751570, 2101884, 2627355, 3503140, 4203768, 5254710, 7006280, 10509420, 21018840]

約数ペア:

[(1, 21018840), (2, 10509420), (3, 7006280), (4, 5254710), (5, 4203768), (6, 3503140), (8, 2627355), (10, 2101884), (12, 1751570), (15, 1401256), (20, 1050942), (24, 875785), (30, 700628), (40, 525471), (60, 350314), (71, 296040), (120, 175157), (142, 148020), (213, 98680), (284, 74010), (355, 59208), (426, 49340), (568, 37005), (710, 29604), (852, 24670), (1065, 19736), (1420, 14802), (1704, 12335), (2130, 9868), (2467, 8520), (2840, 7401), (4260, 4934)]