639850

素因数分解:

$2^1\times 5^2\times {\mathrm{67}}^1\times {\mathrm{191}}^1$

素因数の和:270

約数の個数: 24

約数和(自身を含む): 1214208

約数和(自身を除く): 574358

約数列:

[1, 2, 5, 10, 25, 50, 67, 134, 191, 335, 382, 670, 955, 1675, 1910, 3350, 4775, 9550, 12797, 25594, 63985, 127970, 319925, 639850]

約数ペア:

[(1, 639850), (2, 319925), (5, 127970), (10, 63985), (25, 25594), (50, 12797), (67, 9550), (134, 4775), (191, 3350), (335, 1910), (382, 1675), (670, 955)]