19990520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45433}}^1$

素因数の和:45455

約数の個数: 32

約数和(自身を含む): 49068720

約数和(自身を除く): 29078200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45433, 90866, 181732, 227165, 363464, 454330, 499763, 908660, 999526, 1817320, 1999052, 2498815, 3998104, 4997630, 9995260, 19990520]

約数ペア:

[(1, 19990520), (2, 9995260), (4, 4997630), (5, 3998104), (8, 2498815), (10, 1999052), (11, 1817320), (20, 999526), (22, 908660), (40, 499763), (44, 454330), (55, 363464), (88, 227165), (110, 181732), (220, 90866), (440, 45433)]