64842640

素因数分解:

$2^4\times 5^1\times {\mathrm{810533}}^1$

素因数の和:810546

約数の個数: 20

約数和(自身を含む): 150759324

約数和(自身を除く): 85916684

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810533, 1621066, 3242132, 4052665, 6484264, 8105330, 12968528, 16210660, 32421320, 64842640]

約数ペア:

[(1, 64842640), (2, 32421320), (4, 16210660), (5, 12968528), (8, 8105330), (10, 6484264), (16, 4052665), (20, 3242132), (40, 1621066), (80, 810533)]