21609091

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 6066557

約数列:

[1, 7, 17, 41, 43, 103, 119, 287, 301, 697, 721, 731, 1751, 1763, 4223, 4429, 4879, 5117, 12257, 12341, 29561, 29971, 31003, 71791, 75293, 181589, 209797, 502537, 527051, 1271123, 3087013, 21609091]

約数ペア:

[(1, 21609091), (7, 3087013), (17, 1271123), (41, 527051), (43, 502537), (103, 209797), (119, 181589), (287, 75293), (301, 71791), (697, 31003), (721, 29971), (731, 29561), (1751, 12341), (1763, 12257), (4223, 5117), (4429, 4879)]