16890820

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1621}}^1$

素因数の和:2151

約数の個数: 24

約数和(自身を含む): 35560728

約数和(自身を除く): 18669908

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 1621, 2084, 2605, 3242, 5210, 6484, 8105, 10420, 16210, 32420, 844541, 1689082, 3378164, 4222705, 8445410, 16890820]

約数ペア:

[(1, 16890820), (2, 8445410), (4, 4222705), (5, 3378164), (10, 1689082), (20, 844541), (521, 32420), (1042, 16210), (1621, 10420), (2084, 8105), (2605, 6484), (3242, 5210)]