21039938305

素因数分解:

$5^1\times {\mathrm{389}}^1\times {\mathrm{2129}}^1\times {\mathrm{5081}}^1$

素因数の和:7604

約数の個数: 16

約数和(自身を含む): 25329704400

約数和(自身を除く): 4289766095

約数列:

[1, 5, 389, 1945, 2129, 5081, 10645, 25405, 828181, 1976509, 4140905, 9882545, 10817449, 54087245, 4207987661, 21039938305]

約数ペア:

[(1, 21039938305), (5, 4207987661), (389, 54087245), (1945, 10817449), (2129, 9882545), (5081, 4140905), (10645, 1976509), (25405, 828181)]