81241880

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{3557}}^1$

素因数の和:4139

約数の個数: 32

約数和(自身を含む): 183165840

約数和(自身を除く): 101923960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 1142, 2284, 2855, 3557, 4568, 5710, 7114, 11420, 14228, 17785, 22840, 28456, 35570, 71140, 142280, 2031047, 4062094, 8124188, 10155235, 16248376, 20310470, 40620940, 81241880]

約数ペア:

[(1, 81241880), (2, 40620940), (4, 20310470), (5, 16248376), (8, 10155235), (10, 8124188), (20, 4062094), (40, 2031047), (571, 142280), (1142, 71140), (2284, 35570), (2855, 28456), (3557, 22840), (4568, 17785), (5710, 14228), (7114, 11420)]