20895940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80369}}^1$

素因数の和:80391

約数の個数: 24

約数和(自身を含む): 47257560

約数和(自身を除く): 26361620

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80369, 160738, 321476, 401845, 803690, 1044797, 1607380, 2089594, 4179188, 5223985, 10447970, 20895940]

約数ペア:

[(1, 20895940), (2, 10447970), (4, 5223985), (5, 4179188), (10, 2089594), (13, 1607380), (20, 1044797), (26, 803690), (52, 401845), (65, 321476), (130, 160738), (260, 80369)]