21717925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{373}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 28799496

約数和(自身を除く): 7081571

約数列:

[1, 5, 17, 25, 85, 137, 373, 425, 685, 1865, 2329, 3425, 6341, 9325, 11645, 31705, 51101, 58225, 158525, 255505, 868717, 1277525, 4343585, 21717925]

約数ペア:

[(1, 21717925), (5, 4343585), (17, 1277525), (25, 868717), (85, 255505), (137, 158525), (373, 58225), (425, 51101), (685, 31705), (1865, 11645), (2329, 9325), (3425, 6341)]