261570280

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{9923}}^1$

素因数の和:10593

約数の個数: 32

約数和(自身を含む): 589485600

約数和(自身を除く): 327915320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 1318, 2636, 3295, 5272, 6590, 9923, 13180, 19846, 26360, 39692, 49615, 79384, 99230, 198460, 396920, 6539257, 13078514, 26157028, 32696285, 52314056, 65392570, 130785140, 261570280]

約数ペア:

[(1, 261570280), (2, 130785140), (4, 65392570), (5, 52314056), (8, 32696285), (10, 26157028), (20, 13078514), (40, 6539257), (659, 396920), (1318, 198460), (2636, 99230), (3295, 79384), (5272, 49615), (6590, 39692), (9923, 26360), (13180, 19846)]