64961020

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{21799}}^1$

素因数の和:21957

約数の個数: 24

約数和(自身を含む): 137340000

約数和(自身を除く): 72378980

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 21799, 43598, 87196, 108995, 217990, 435980, 3248051, 6496102, 12992204, 16240255, 32480510, 64961020]

約数ペア:

[(1, 64961020), (2, 32480510), (4, 16240255), (5, 12992204), (10, 6496102), (20, 3248051), (149, 435980), (298, 217990), (596, 108995), (745, 87196), (1490, 43598), (2980, 21799)]