1871225

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 18

約数和(自身を含む): 2430090

約数和(自身を除く): 558865

約数列:

[1, 5, 25, 29, 89, 145, 445, 725, 841, 2225, 2581, 4205, 12905, 21025, 64525, 74849, 374245, 1871225]

約数ペア:

[(1, 1871225), (5, 374245), (25, 74849), (29, 64525), (89, 21025), (145, 12905), (445, 4205), (725, 2581), (841, 2225)]