20997757

素因数分解:

${\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:624

約数の個数: 16

約数和(自身を含む): 23869440

約数和(自身を除く): 2871683

約数列:

[1, 11, 31, 139, 341, 443, 1529, 4309, 4873, 13733, 47399, 61577, 151063, 677347, 1908887, 20997757]

約数ペア:

[(1, 20997757), (11, 1908887), (31, 677347), (139, 151063), (341, 61577), (443, 47399), (1529, 13733), (4309, 4873)]