78851980

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{7901}}^1$

素因数の和:8409

約数の個数: 24

約数和(自身を含む): 165942000

約数和(自身を除く): 87090020

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2495, 4990, 7901, 9980, 15802, 31604, 39505, 79010, 158020, 3942599, 7885198, 15770396, 19712995, 39425990, 78851980]

約数ペア:

[(1, 78851980), (2, 39425990), (4, 19712995), (5, 15770396), (10, 7885198), (20, 3942599), (499, 158020), (998, 79010), (1996, 39505), (2495, 31604), (4990, 15802), (7901, 9980)]