20851515

素因数分解:

$3^2\times 5^1\times {\mathrm{617}}^1\times {\mathrm{751}}^1$

素因数の和:1379

約数の個数: 24

約数和(自身を含む): 36249408

約数和(自身を除く): 15397893

約数列:

[1, 3, 5, 9, 15, 45, 617, 751, 1851, 2253, 3085, 3755, 5553, 6759, 9255, 11265, 27765, 33795, 463367, 1390101, 2316835, 4170303, 6950505, 20851515]

約数ペア:

[(1, 20851515), (3, 6950505), (5, 4170303), (9, 2316835), (15, 1390101), (45, 463367), (617, 33795), (751, 27765), (1851, 11265), (2253, 9255), (3085, 6759), (3755, 5553)]