20870815

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{5011}}^1$

素因数の和:5047

約数の個数: 24

約数和(自身を含む): 30853872

約数和(自身を除く): 9983057

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 5011, 25055, 35077, 85187, 175385, 245539, 425935, 596309, 1227695, 2981545, 4174163, 20870815]

約数ペア:

[(1, 20870815), (5, 4174163), (7, 2981545), (17, 1227695), (35, 596309), (49, 425935), (85, 245539), (119, 175385), (245, 85187), (595, 35077), (833, 25055), (4165, 5011)]