21526760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31657}}^1$

素因数の和:31685

約数の個数: 32

約数和(自身を含む): 51285960

約数和(自身を除く): 29759200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31657, 63314, 126628, 158285, 253256, 316570, 538169, 633140, 1076338, 1266280, 2152676, 2690845, 4305352, 5381690, 10763380, 21526760]

約数ペア:

[(1, 21526760), (2, 10763380), (4, 5381690), (5, 4305352), (8, 2690845), (10, 2152676), (17, 1266280), (20, 1076338), (34, 633140), (40, 538169), (68, 316570), (85, 253256), (136, 158285), (170, 126628), (340, 63314), (680, 31657)]