20056780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1123}}^1$

素因数の和:1198

約数の個数: 48

約数和(自身を含む): 45319680

約数和(自身を除く): 25262900

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 47, 76, 94, 95, 188, 190, 235, 380, 470, 893, 940, 1123, 1786, 2246, 3572, 4465, 4492, 5615, 8930, 11230, 17860, 21337, 22460, 42674, 52781, 85348, 105562, 106685, 211124, 213370, 263905, 426740, 527810, 1002839, 1055620, 2005678, 4011356, 5014195, 10028390, 20056780]

約数ペア:

[(1, 20056780), (2, 10028390), (4, 5014195), (5, 4011356), (10, 2005678), (19, 1055620), (20, 1002839), (38, 527810), (47, 426740), (76, 263905), (94, 213370), (95, 211124), (188, 106685), (190, 105562), (235, 85348), (380, 52781), (470, 42674), (893, 22460), (940, 21337), (1123, 17860), (1786, 11230), (2246, 8930), (3572, 5615), (4465, 4492)]