131128420

素因数分解:

$2^2\times 5^1\times {\mathrm{6556421}}^1$

素因数の和:6556430

約数の個数: 12

約数和(自身を含む): 275369724

約数和(自身を除く): 144241304

約数列:

[1, 2, 4, 5, 10, 20, 6556421, 13112842, 26225684, 32782105, 65564210, 131128420]

約数ペア:

[(1, 131128420), (2, 65564210), (4, 32782105), (5, 26225684), (10, 13112842), (20, 6556421)]