20178425

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:317

約数の個数: 24

約数和(自身を含む): 25920216

約数和(自身を除く): 5741791

約数列:

[1, 5, 25, 53, 97, 157, 265, 485, 785, 1325, 2425, 3925, 5141, 8321, 15229, 25705, 41605, 76145, 128525, 208025, 380725, 807137, 4035685, 20178425]

約数ペア:

[(1, 20178425), (5, 4035685), (25, 807137), (53, 380725), (97, 208025), (157, 128525), (265, 76145), (485, 41605), (785, 25705), (1325, 15229), (2425, 8321), (3925, 5141)]