20441980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78623}}^1$

素因数の和:78645

約数の個数: 24

約数和(自身を含む): 46230912

約数和(自身を除く): 25788932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78623, 157246, 314492, 393115, 786230, 1022099, 1572460, 2044198, 4088396, 5110495, 10220990, 20441980]

約数ペア:

[(1, 20441980), (2, 10220990), (4, 5110495), (5, 4088396), (10, 2044198), (13, 1572460), (20, 1022099), (26, 786230), (52, 393115), (65, 314492), (130, 157246), (260, 78623)]