81557555

素因数分解:

$5^1\times {\mathrm{139}}^1\times {\mathrm{239}}^1\times {\mathrm{491}}^1$

素因数の和:874

約数の個数: 16

約数和(自身を含む): 99187200

約数和(自身を除く): 17629645

約数列:

[1, 5, 139, 239, 491, 695, 1195, 2455, 33221, 68249, 117349, 166105, 341245, 586745, 16311511, 81557555]

約数ペア:

[(1, 81557555), (5, 16311511), (139, 586745), (239, 341245), (491, 166105), (695, 117349), (1195, 68249), (2455, 33221)]