18581980

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{9199}}^1$

素因数の和:9309

約数の個数: 24

約数和(自身を含む): 39412800

約数和(自身を除く): 20830820

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 9199, 18398, 36796, 45995, 91990, 183980, 929099, 1858198, 3716396, 4645495, 9290990, 18581980]

約数ペア:

[(1, 18581980), (2, 9290990), (4, 4645495), (5, 3716396), (10, 1858198), (20, 929099), (101, 183980), (202, 91990), (404, 45995), (505, 36796), (1010, 18398), (2020, 9199)]