81856528

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393541}}^1$

素因数の和:393562

約数の個数: 20

約数和(自身を含む): 170797228

約数和(自身を除く): 88940700

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393541, 787082, 1574164, 3148328, 5116033, 6296656, 10232066, 20464132, 40928264, 81856528]

約数ペア:

[(1, 81856528), (2, 40928264), (4, 20464132), (8, 10232066), (13, 6296656), (16, 5116033), (26, 3148328), (52, 1574164), (104, 787082), (208, 393541)]