81685405

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{2503}}^1$

素因数の和:2676

約数の個数: 16

約数和(自身を含む): 100600704

約数和(自身を除く): 18915299

約数列:

[1, 5, 61, 107, 305, 535, 2503, 6527, 12515, 32635, 152683, 267821, 763415, 1339105, 16337081, 81685405]

約数ペア:

[(1, 81685405), (5, 16337081), (61, 1339105), (107, 763415), (305, 267821), (535, 152683), (2503, 32635), (6527, 12515)]