21253850

素因数分解:

$2^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{5987}}^1$

素因数の和:6070

約数の個数: 24

約数和(自身を含む): 40095648

約数和(自身を除く): 18841798

約数列:

[1, 2, 5, 10, 25, 50, 71, 142, 355, 710, 1775, 3550, 5987, 11974, 29935, 59870, 149675, 299350, 425077, 850154, 2125385, 4250770, 10626925, 21253850]

約数ペア:

[(1, 21253850), (2, 10626925), (5, 4250770), (10, 2125385), (25, 850154), (50, 425077), (71, 299350), (142, 149675), (355, 59870), (710, 29935), (1775, 11974), (3550, 5987)]