81807205

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:405

約数の個数: 24

約数和(自身を含む): 103800312

約数和(自身を除く): 21993107

約数列:

[1, 5, 23, 115, 157, 197, 529, 785, 985, 2645, 3611, 4531, 18055, 22655, 30929, 83053, 104213, 154645, 415265, 521065, 711367, 3556835, 16361441, 81807205]

約数ペア:

[(1, 81807205), (5, 16361441), (23, 3556835), (115, 711367), (157, 521065), (197, 415265), (529, 154645), (785, 104213), (985, 83053), (2645, 30929), (3611, 22655), (4531, 18055)]