20513420

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4861}}^1$

素因数の和:5081

約数の個数: 24

約数和(自身を含む): 43291248

約数和(自身を除く): 22777828

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4861, 9722, 19444, 24305, 48610, 97220, 1025671, 2051342, 4102684, 5128355, 10256710, 20513420]

約数ペア:

[(1, 20513420), (2, 10256710), (4, 5128355), (5, 4102684), (10, 2051342), (20, 1025671), (211, 97220), (422, 48610), (844, 24305), (1055, 19444), (2110, 9722), (4220, 4861)]