678140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{827}}^1$

素因数の和:877

約数の個数: 24

約数和(自身を含む): 1460592

約数和(自身を除く): 782452

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 827, 1654, 3308, 4135, 8270, 16540, 33907, 67814, 135628, 169535, 339070, 678140]

約数ペア:

[(1, 678140), (2, 339070), (4, 169535), (5, 135628), (10, 67814), (20, 33907), (41, 16540), (82, 8270), (164, 4135), (205, 3308), (410, 1654), (820, 827)]