20897777

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 25401600

約数和(自身を除く): 4503823

約数列:

[1, 17, 19, 23, 29, 97, 323, 391, 437, 493, 551, 667, 1649, 1843, 2231, 2813, 7429, 9367, 11339, 12673, 31331, 37927, 42389, 47821, 53447, 64699, 215441, 720613, 908599, 1099883, 1229281, 20897777]

約数ペア:

[(1, 20897777), (17, 1229281), (19, 1099883), (23, 908599), (29, 720613), (97, 215441), (323, 64699), (391, 53447), (437, 47821), (493, 42389), (551, 37927), (667, 31331), (1649, 12673), (1843, 11339), (2231, 9367), (2813, 7429)]