20817909

素因数分解:

$3^2\times 7^1\times {\mathrm{491}}^1\times {\mathrm{673}}^1$

素因数の和:1177

約数の個数: 24

約数和(自身を含む): 34487232

約数和(自身を除く): 13669323

約数列:

[1, 3, 7, 9, 21, 63, 491, 673, 1473, 2019, 3437, 4419, 4711, 6057, 10311, 14133, 30933, 42399, 330443, 991329, 2313101, 2973987, 6939303, 20817909]

約数ペア:

[(1, 20817909), (3, 6939303), (7, 2973987), (9, 2313101), (21, 991329), (63, 330443), (491, 42399), (673, 30933), (1473, 14133), (2019, 10311), (3437, 6057), (4419, 4711)]