81272740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{66617}}^1$

素因数の和:66687

約数の個数: 24

約数和(自身を含む): 173473272

約数和(自身を除く): 92200532

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 66617, 133234, 266468, 333085, 666170, 1332340, 4063637, 8127274, 16254548, 20318185, 40636370, 81272740]

約数ペア:

[(1, 81272740), (2, 40636370), (4, 20318185), (5, 16254548), (10, 8127274), (20, 4063637), (61, 1332340), (122, 666170), (244, 333085), (305, 266468), (610, 133234), (1220, 66617)]