128517640

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{10331}}^1$

素因数の和:10653

約数の個数: 32

約数和(自身を含む): 290122560

約数和(自身を除く): 161604920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 10331, 12440, 20662, 41324, 51655, 82648, 103310, 206620, 413240, 3212941, 6425882, 12851764, 16064705, 25703528, 32129410, 64258820, 128517640]

約数ペア:

[(1, 128517640), (2, 64258820), (4, 32129410), (5, 25703528), (8, 16064705), (10, 12851764), (20, 6425882), (40, 3212941), (311, 413240), (622, 206620), (1244, 103310), (1555, 82648), (2488, 51655), (3110, 41324), (6220, 20662), (10331, 12440)]