19913840

素因数分解:

$2^4\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1087}}^1$

素因数の和:1329

約数の個数: 40

約数和(自身を含む): 46544640

約数和(自身を除く): 26630800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 229, 458, 916, 1087, 1145, 1832, 2174, 2290, 3664, 4348, 4580, 5435, 8696, 9160, 10870, 17392, 18320, 21740, 43480, 86960, 248923, 497846, 995692, 1244615, 1991384, 2489230, 3982768, 4978460, 9956920, 19913840]

約数ペア:

[(1, 19913840), (2, 9956920), (4, 4978460), (5, 3982768), (8, 2489230), (10, 1991384), (16, 1244615), (20, 995692), (40, 497846), (80, 248923), (229, 86960), (458, 43480), (916, 21740), (1087, 18320), (1145, 17392), (1832, 10870), (2174, 9160), (2290, 8696), (3664, 5435), (4348, 4580)]