20198125

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{1901}}^1$

素因数の和:1938

約数の個数: 20

約数和(自身を含む): 26738316

約数和(自身を除く): 6540191

約数列:

[1, 5, 17, 25, 85, 125, 425, 625, 1901, 2125, 9505, 10625, 32317, 47525, 161585, 237625, 807925, 1188125, 4039625, 20198125]

約数ペア:

[(1, 20198125), (5, 4039625), (17, 1188125), (25, 807925), (85, 237625), (125, 161585), (425, 47525), (625, 32317), (1901, 10625), (2125, 9505)]