72439280

素因数分解:

$2^4\times 5^1\times {\mathrm{905491}}^1$

素因数の和:905504

約数の個数: 20

約数和(自身を含む): 168421512

約数和(自身を除く): 95982232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 905491, 1810982, 3621964, 4527455, 7243928, 9054910, 14487856, 18109820, 36219640, 72439280]

約数ペア:

[(1, 72439280), (2, 36219640), (4, 18109820), (5, 14487856), (8, 9054910), (10, 7243928), (16, 4527455), (20, 3621964), (40, 1810982), (80, 905491)]