18205555

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{293}}^1$

素因数の和:375

約数の個数: 24

約数和(自身を含む): 23828112

約数和(自身を除く): 5622557

約数列:

[1, 5, 17, 43, 85, 215, 289, 293, 731, 1445, 1465, 3655, 4981, 12427, 12599, 24905, 62135, 62995, 84677, 214183, 423385, 1070915, 3641111, 18205555]

約数ペア:

[(1, 18205555), (5, 3641111), (17, 1070915), (43, 423385), (85, 214183), (215, 84677), (289, 62995), (293, 62135), (731, 24905), (1445, 12599), (1465, 12427), (3655, 4981)]