81981316

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{337}}^1\times {\mathrm{997}}^1$

素因数の和:1399

約数の個数: 24

約数和(自身を含む): 146398616

約数和(自身を除く): 64417300

約数列:

[1, 2, 4, 61, 122, 244, 337, 674, 997, 1348, 1994, 3988, 20557, 41114, 60817, 82228, 121634, 243268, 335989, 671978, 1343956, 20495329, 40990658, 81981316]

約数ペア:

[(1, 81981316), (2, 40990658), (4, 20495329), (61, 1343956), (122, 671978), (244, 335989), (337, 243268), (674, 121634), (997, 82228), (1348, 60817), (1994, 41114), (3988, 20557)]