20485820

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7369}}^1$

素因数の和:7517

約数の個数: 24

約数和(自身を含む): 43335600

約数和(自身を除く): 22849780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7369, 14738, 29476, 36845, 73690, 147380, 1024291, 2048582, 4097164, 5121455, 10242910, 20485820]

約数ペア:

[(1, 20485820), (2, 10242910), (4, 5121455), (5, 4097164), (10, 2048582), (20, 1024291), (139, 147380), (278, 73690), (556, 36845), (695, 29476), (1390, 14738), (2780, 7369)]