20665825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{313}}^1$

素因数の和:481

約数の個数: 24

約数和(自身を含む): 27255200

約数和(自身を除く): 6589375

約数列:

[1, 5, 19, 25, 95, 139, 313, 475, 695, 1565, 2641, 3475, 5947, 7825, 13205, 29735, 43507, 66025, 148675, 217535, 826633, 1087675, 4133165, 20665825]

約数ペア:

[(1, 20665825), (5, 4133165), (19, 1087675), (25, 826633), (95, 217535), (139, 148675), (313, 66025), (475, 43507), (695, 29735), (1565, 13205), (2641, 7825), (3475, 5947)]