20408390

素因数分解:

$2^1\times 5^1\times {\mathrm{1259}}^1\times {\mathrm{1621}}^1$

素因数の和:2887

約数の個数: 16

約数和(自身を含む): 36786960

約数和(自身を除く): 16378570

約数列:

[1, 2, 5, 10, 1259, 1621, 2518, 3242, 6295, 8105, 12590, 16210, 2040839, 4081678, 10204195, 20408390]

約数ペア:

[(1, 20408390), (2, 10204195), (5, 4081678), (10, 2040839), (1259, 16210), (1621, 12590), (2518, 8105), (3242, 6295)]