639855

素因数分解:

$3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{241}}^1$

素因数の和:311

約数の個数: 24

約数和(自身を含む): 1132560

約数和(自身を除く): 492705

約数列:

[1, 3, 5, 9, 15, 45, 59, 177, 241, 295, 531, 723, 885, 1205, 2169, 2655, 3615, 10845, 14219, 42657, 71095, 127971, 213285, 639855]

約数ペア:

[(1, 639855), (3, 213285), (5, 127971), (9, 71095), (15, 42657), (45, 14219), (59, 10845), (177, 3615), (241, 2655), (295, 2169), (531, 1205), (723, 885)]