19902320

素因数分解:

$2^4\times 5^1\times {\mathrm{248779}}^1$

素因数の和:248792

約数の個数: 20

約数和(自身を含む): 46273080

約数和(自身を除く): 26370760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248779, 497558, 995116, 1243895, 1990232, 2487790, 3980464, 4975580, 9951160, 19902320]

約数ペア:

[(1, 19902320), (2, 9951160), (4, 4975580), (5, 3980464), (8, 2487790), (10, 1990232), (16, 1243895), (20, 995116), (40, 497558), (80, 248779)]