388996840

素因数分解:

$2^3\times 5^1\times {\mathrm{9724921}}^1$

素因数の和:9724932

約数の個数: 16

約数和(自身を含む): 875242980

約数和(自身を除く): 486246140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9724921, 19449842, 38899684, 48624605, 77799368, 97249210, 194498420, 388996840]

約数ペア:

[(1, 388996840), (2, 194498420), (4, 97249210), (5, 77799368), (8, 48624605), (10, 38899684), (20, 19449842), (40, 9724921)]