21047145

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{4889}}^1$

素因数の和:4945

約数の個数: 32

約数和(自身を含む): 39432960

約数和(自身を除く): 18385815

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 105, 123, 205, 287, 615, 861, 1435, 4305, 4889, 14667, 24445, 34223, 73335, 102669, 171115, 200449, 513345, 601347, 1002245, 1403143, 3006735, 4209429, 7015715, 21047145]

約数ペア:

[(1, 21047145), (3, 7015715), (5, 4209429), (7, 3006735), (15, 1403143), (21, 1002245), (35, 601347), (41, 513345), (105, 200449), (123, 171115), (205, 102669), (287, 73335), (615, 34223), (861, 24445), (1435, 14667), (4305, 4889)]