66978020

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{8609}}^1$

素因数の和:9007

約数の個数: 24

約数和(自身を含む): 141031800

約数和(自身を除く): 74053780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 8609, 17218, 34436, 43045, 86090, 172180, 3348901, 6697802, 13395604, 16744505, 33489010, 66978020]

約数ペア:

[(1, 66978020), (2, 33489010), (4, 16744505), (5, 13395604), (10, 6697802), (20, 3348901), (389, 172180), (778, 86090), (1556, 43045), (1945, 34436), (3890, 17218), (7780, 8609)]