21039625

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{9901}}^1$

素因数の和:9933

約数の個数: 16

約数和(自身を含む): 27804816

約数和(自身を除く): 6765191

約数列:

[1, 5, 17, 25, 85, 125, 425, 2125, 9901, 49505, 168317, 247525, 841585, 1237625, 4207925, 21039625]

約数ペア:

[(1, 21039625), (5, 4207925), (17, 1237625), (25, 841585), (85, 247525), (125, 168317), (425, 49505), (2125, 9901)]