20175815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:527

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8336185

約数列:

[1, 5, 11, 19, 43, 55, 95, 209, 215, 449, 473, 817, 1045, 2245, 2365, 4085, 4939, 8531, 8987, 19307, 24695, 42655, 44935, 93841, 96535, 212377, 366833, 469205, 1061885, 1834165, 4035163, 20175815]

約数ペア:

[(1, 20175815), (5, 4035163), (11, 1834165), (19, 1061885), (43, 469205), (55, 366833), (95, 212377), (209, 96535), (215, 93841), (449, 44935), (473, 42655), (817, 24695), (1045, 19307), (2245, 8987), (2365, 8531), (4085, 4939)]