21038125

素因数分解:

$5^4\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:882

約数の個数: 20

約数和(自身を含む): 26963244

約数和(自身を除く): 5925119

約数列:

[1, 5, 25, 41, 125, 205, 625, 821, 1025, 4105, 5125, 20525, 25625, 33661, 102625, 168305, 513125, 841525, 4207625, 21038125]

約数ペア:

[(1, 21038125), (5, 4207625), (25, 841525), (41, 513125), (125, 168305), (205, 102625), (625, 33661), (821, 25625), (1025, 20525), (4105, 5125)]