21271020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{6689}}^1$

素因数の和:6754

約数の個数: 48

約数和(自身を含む): 60691680

約数和(自身を除く): 39420660

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 53, 60, 106, 159, 212, 265, 318, 530, 636, 795, 1060, 1590, 3180, 6689, 13378, 20067, 26756, 33445, 40134, 66890, 80268, 100335, 133780, 200670, 354517, 401340, 709034, 1063551, 1418068, 1772585, 2127102, 3545170, 4254204, 5317755, 7090340, 10635510, 21271020]

約数ペア:

[(1, 21271020), (2, 10635510), (3, 7090340), (4, 5317755), (5, 4254204), (6, 3545170), (10, 2127102), (12, 1772585), (15, 1418068), (20, 1063551), (30, 709034), (53, 401340), (60, 354517), (106, 200670), (159, 133780), (212, 100335), (265, 80268), (318, 66890), (530, 40134), (636, 33445), (795, 26756), (1060, 20067), (1590, 13378), (3180, 6689)]