21778895

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1979}}^1$

素因数の和:2086

約数の個数: 16

約数和(自身を含む): 27371520

約数和(自身を除く): 5592625

約数列:

[1, 5, 31, 71, 155, 355, 1979, 2201, 9895, 11005, 61349, 140509, 306745, 702545, 4355779, 21778895]

約数ペア:

[(1, 21778895), (5, 4355779), (31, 702545), (71, 306745), (155, 140509), (355, 61349), (1979, 11005), (2201, 9895)]