79994020

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{199}}^2$

素因数の和:508

約数の個数: 36

約数和(自身を含む): 170507484

約数和(自身を除く): 90513464

約数列:

[1, 2, 4, 5, 10, 20, 101, 199, 202, 398, 404, 505, 796, 995, 1010, 1990, 2020, 3980, 20099, 39601, 40198, 79202, 80396, 100495, 158404, 198005, 200990, 396010, 401980, 792020, 3999701, 7999402, 15998804, 19998505, 39997010, 79994020]

約数ペア:

[(1, 79994020), (2, 39997010), (4, 19998505), (5, 15998804), (10, 7999402), (20, 3999701), (101, 792020), (199, 401980), (202, 396010), (398, 200990), (404, 198005), (505, 158404), (796, 100495), (995, 80396), (1010, 79202), (1990, 40198), (2020, 39601), (3980, 20099)]