21112020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2213}}^1$

素因数の和:2281

約数の個数: 72

約数和(自身を含む): 65277576

約数和(自身を除く): 44165556

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 53, 60, 90, 106, 159, 180, 212, 265, 318, 477, 530, 636, 795, 954, 1060, 1590, 1908, 2213, 2385, 3180, 4426, 4770, 6639, 8852, 9540, 11065, 13278, 19917, 22130, 26556, 33195, 39834, 44260, 66390, 79668, 99585, 117289, 132780, 199170, 234578, 351867, 398340, 469156, 586445, 703734, 1055601, 1172890, 1407468, 1759335, 2111202, 2345780, 3518670, 4222404, 5278005, 7037340, 10556010, 21112020]

約数ペア:

[(1, 21112020), (2, 10556010), (3, 7037340), (4, 5278005), (5, 4222404), (6, 3518670), (9, 2345780), (10, 2111202), (12, 1759335), (15, 1407468), (18, 1172890), (20, 1055601), (30, 703734), (36, 586445), (45, 469156), (53, 398340), (60, 351867), (90, 234578), (106, 199170), (159, 132780), (180, 117289), (212, 99585), (265, 79668), (318, 66390), (477, 44260), (530, 39834), (636, 33195), (795, 26556), (954, 22130), (1060, 19917), (1590, 13278), (1908, 11065), (2213, 9540), (2385, 8852), (3180, 6639), (4426, 4770)]