20809870820

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4048613}}^1$

素因数の和:4048879

約数の個数: 24

約数和(自身を含む): 43870781304

約数和(自身を除く): 23060910484

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 5140, 4048613, 8097226, 16194452, 20243065, 40486130, 80972260, 1040493541, 2080987082, 4161974164, 5202467705, 10404935410, 20809870820]

約数ペア:

[(1, 20809870820), (2, 10404935410), (4, 5202467705), (5, 4161974164), (10, 2080987082), (20, 1040493541), (257, 80972260), (514, 40486130), (1028, 20243065), (1285, 16194452), (2570, 8097226), (5140, 4048613)]