81306580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239137}}^1$

素因数の和:239163

約数の個数: 24

約数和(自身を含む): 180788328

約数和(自身を除く): 99481748

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 239137, 478274, 956548, 1195685, 2391370, 4065329, 4782740, 8130658, 16261316, 20326645, 40653290, 81306580]

約数ペア:

[(1, 81306580), (2, 40653290), (4, 20326645), (5, 16261316), (10, 8130658), (17, 4782740), (20, 4065329), (34, 2391370), (68, 1195685), (85, 956548), (170, 478274), (340, 239137)]