21375025

素因数分解:

$5^2\times 7^2\times {\mathrm{17449}}^1$

素因数の和:17473

約数の個数: 18

約数和(自身を含む): 30834150

約数和(自身を除く): 9459125

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 17449, 87245, 122143, 436225, 610715, 855001, 3053575, 4275005, 21375025]

約数ペア:

[(1, 21375025), (5, 4275005), (7, 3053575), (25, 855001), (35, 610715), (49, 436225), (175, 122143), (245, 87245), (1225, 17449)]