18681691

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{547}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 23614416

約数和(自身を除く): 4932725

約数列:

[1, 7, 17, 41, 49, 119, 287, 547, 697, 833, 2009, 3829, 4879, 9299, 22427, 26803, 34153, 65093, 156989, 381259, 455651, 1098923, 2668813, 18681691]

約数ペア:

[(1, 18681691), (7, 2668813), (17, 1098923), (41, 455651), (49, 381259), (119, 156989), (287, 65093), (547, 34153), (697, 26803), (833, 22427), (2009, 9299), (3829, 4879)]