19801700

素因数分解:

$2^2\times 5^2\times {\mathrm{198017}}^1$

素因数の和:198031

約数の個数: 18

約数和(自身を含む): 42969906

約数和(自身を除く): 23168206

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 198017, 396034, 792068, 990085, 1980170, 3960340, 4950425, 9900850, 19801700]

約数ペア:

[(1, 19801700), (2, 9900850), (4, 4950425), (5, 3960340), (10, 1980170), (20, 990085), (25, 792068), (50, 396034), (100, 198017)]