19791980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76123}}^1$

素因数の和:76145

約数の個数: 24

約数和(自身を含む): 44760912

約数和(自身を除く): 24968932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76123, 152246, 304492, 380615, 761230, 989599, 1522460, 1979198, 3958396, 4947995, 9895990, 19791980]

約数ペア:

[(1, 19791980), (2, 9895990), (4, 4947995), (5, 3958396), (10, 1979198), (13, 1522460), (20, 989599), (26, 761230), (52, 380615), (65, 304492), (130, 152246), (260, 76123)]