18785780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72253}}^1$

素因数の和:72275

約数の個数: 24

約数和(自身を含む): 42485352

約数和(自身を除く): 23699572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72253, 144506, 289012, 361265, 722530, 939289, 1445060, 1878578, 3757156, 4696445, 9392890, 18785780]

約数ペア:

[(1, 18785780), (2, 9392890), (4, 4696445), (5, 3757156), (10, 1878578), (13, 1445060), (20, 939289), (26, 722530), (52, 361265), (65, 289012), (130, 144506), (260, 72253)]