21802570

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1297}}^1$

素因数の和:1386

約数の個数: 24

約数和(自身を含む): 40256172

約数和(自身を除く): 18453602

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1297, 1681, 2594, 3362, 6485, 8405, 12970, 16810, 53177, 106354, 265885, 531770, 2180257, 4360514, 10901285, 21802570]

約数ペア:

[(1, 21802570), (2, 10901285), (5, 4360514), (10, 2180257), (41, 531770), (82, 265885), (205, 106354), (410, 53177), (1297, 16810), (1681, 12970), (2594, 8405), (3362, 6485)]