20815053

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 34309440

約数和(自身を除く): 13494387

約数列:

[1, 3, 7, 21, 37, 43, 49, 89, 111, 129, 147, 259, 267, 301, 623, 777, 903, 1591, 1813, 1869, 2107, 3293, 3827, 4361, 4773, 5439, 6321, 9879, 11137, 11481, 13083, 23051, 26789, 33411, 69153, 77959, 80367, 141599, 161357, 187523, 233877, 424797, 484071, 562569, 991193, 2973579, 6938351, 20815053]

約数ペア:

[(1, 20815053), (3, 6938351), (7, 2973579), (21, 991193), (37, 562569), (43, 484071), (49, 424797), (89, 233877), (111, 187523), (129, 161357), (147, 141599), (259, 80367), (267, 77959), (301, 69153), (623, 33411), (777, 26789), (903, 23051), (1591, 13083), (1813, 11481), (1869, 11137), (2107, 9879), (3293, 6321), (3827, 5439), (4361, 4773)]