19905025

素因数分解:

$5^2\times 7^2\times {\mathrm{16249}}^1$

素因数の和:16273

約数の個数: 18

約数和(自身を含む): 28713750

約数和(自身を除く): 8808725

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 16249, 81245, 113743, 406225, 568715, 796201, 2843575, 3981005, 19905025]

約数ペア:

[(1, 19905025), (5, 3981005), (7, 2843575), (25, 796201), (35, 568715), (49, 406225), (175, 113743), (245, 81245), (1225, 16249)]