21319250

素因数分解:

$2^1\times 5^3\times {\mathrm{53}}^1\times {\mathrm{1609}}^1$

素因数の和:1679

約数の個数: 32

約数和(自身を含む): 40687920

約数和(自身を除く): 19368670

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 125, 250, 265, 530, 1325, 1609, 2650, 3218, 6625, 8045, 13250, 16090, 40225, 80450, 85277, 170554, 201125, 402250, 426385, 852770, 2131925, 4263850, 10659625, 21319250]

約数ペア:

[(1, 21319250), (2, 10659625), (5, 4263850), (10, 2131925), (25, 852770), (50, 426385), (53, 402250), (106, 201125), (125, 170554), (250, 85277), (265, 80450), (530, 40225), (1325, 16090), (1609, 13250), (2650, 8045), (3218, 6625)]