21457085

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{379}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 28372320

約数和(自身を除く): 6915235

約数列:

[1, 5, 13, 65, 67, 169, 335, 379, 845, 871, 1895, 4355, 4927, 11323, 24635, 25393, 56615, 64051, 126965, 320255, 330109, 1650545, 4291417, 21457085]

約数ペア:

[(1, 21457085), (5, 4291417), (13, 1650545), (65, 330109), (67, 320255), (169, 126965), (335, 64051), (379, 56615), (845, 25393), (871, 24635), (1895, 11323), (4355, 4927)]