28580920

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1747}}^1$

素因数の和:2167

約数の個数: 32

約数和(自身を含む): 64501200

約数和(自身を除く): 35920280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 1747, 2045, 3272, 3494, 4090, 6988, 8180, 8735, 13976, 16360, 17470, 34940, 69880, 714523, 1429046, 2858092, 3572615, 5716184, 7145230, 14290460, 28580920]

約数ペア:

[(1, 28580920), (2, 14290460), (4, 7145230), (5, 5716184), (8, 3572615), (10, 2858092), (20, 1429046), (40, 714523), (409, 69880), (818, 34940), (1636, 17470), (1747, 16360), (2045, 13976), (3272, 8735), (3494, 8180), (4090, 6988)]