19888040

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1181}}^1$

素因数の和:1613

約数の個数: 32

約数和(自身を含む): 44892360

約数和(自身を除く): 25004320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1181, 1684, 2105, 2362, 3368, 4210, 4724, 5905, 8420, 9448, 11810, 16840, 23620, 47240, 497201, 994402, 1988804, 2486005, 3977608, 4972010, 9944020, 19888040]

約数ペア:

[(1, 19888040), (2, 9944020), (4, 4972010), (5, 3977608), (8, 2486005), (10, 1988804), (20, 994402), (40, 497201), (421, 47240), (842, 23620), (1181, 16840), (1684, 11810), (2105, 9448), (2362, 8420), (3368, 5905), (4210, 4724)]