81551620

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37409}}^1$

素因数の和:37527

約数の個数: 24

約数和(自身を含む): 172834200

約数和(自身を除く): 91282580

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37409, 74818, 149636, 187045, 374090, 748180, 4077581, 8155162, 16310324, 20387905, 40775810, 81551620]

約数ペア:

[(1, 81551620), (2, 40775810), (4, 20387905), (5, 16310324), (10, 8155162), (20, 4077581), (109, 748180), (218, 374090), (436, 187045), (545, 149636), (1090, 74818), (2180, 37409)]