21250820

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8111}}^1$

素因数の和:8251

約数の個数: 24

約数和(自身を含む): 44972928

約数和(自身を除く): 23722108

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8111, 16222, 32444, 40555, 81110, 162220, 1062541, 2125082, 4250164, 5312705, 10625410, 21250820]

約数ペア:

[(1, 21250820), (2, 10625410), (4, 5312705), (5, 4250164), (10, 2125082), (20, 1062541), (131, 162220), (262, 81110), (524, 40555), (655, 32444), (1310, 16222), (2620, 8111)]