17900920

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1063}}^1$

素因数の和:1495

約数の個数: 32

約数和(自身を含む): 40410720

約数和(自身を除く): 22509800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1063, 1684, 2105, 2126, 3368, 4210, 4252, 5315, 8420, 8504, 10630, 16840, 21260, 42520, 447523, 895046, 1790092, 2237615, 3580184, 4475230, 8950460, 17900920]

約数ペア:

[(1, 17900920), (2, 8950460), (4, 4475230), (5, 3580184), (8, 2237615), (10, 1790092), (20, 895046), (40, 447523), (421, 42520), (842, 21260), (1063, 16840), (1684, 10630), (2105, 8504), (2126, 8420), (3368, 5315), (4210, 4252)]