81271580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312583}}^1$

素因数の和:312605

約数の個数: 24

約数和(自身を含む): 183799392

約数和(自身を除く): 102527812

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312583, 625166, 1250332, 1562915, 3125830, 4063579, 6251660, 8127158, 16254316, 20317895, 40635790, 81271580]

約数ペア:

[(1, 81271580), (2, 40635790), (4, 20317895), (5, 16254316), (10, 8127158), (13, 6251660), (20, 4063579), (26, 3125830), (52, 1562915), (65, 1250332), (130, 625166), (260, 312583)]