21091850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{877}}^1$

素因数の和:939

約数の個数: 48

約数和(自身を含む): 43439928

約数和(自身を除く): 22348078

約数列:

[1, 2, 5, 10, 13, 25, 26, 37, 50, 65, 74, 130, 185, 325, 370, 481, 650, 877, 925, 962, 1754, 1850, 2405, 4385, 4810, 8770, 11401, 12025, 21925, 22802, 24050, 32449, 43850, 57005, 64898, 114010, 162245, 285025, 324490, 421837, 570050, 811225, 843674, 1622450, 2109185, 4218370, 10545925, 21091850]

約数ペア:

[(1, 21091850), (2, 10545925), (5, 4218370), (10, 2109185), (13, 1622450), (25, 843674), (26, 811225), (37, 570050), (50, 421837), (65, 324490), (74, 285025), (130, 162245), (185, 114010), (325, 64898), (370, 57005), (481, 43850), (650, 32449), (877, 24050), (925, 22802), (962, 21925), (1754, 12025), (1850, 11401), (2405, 8770), (4385, 4810)]