21730779

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16008741

約数列:

[1, 3, 7, 9, 21, 41, 47, 63, 123, 141, 179, 287, 329, 369, 423, 537, 861, 987, 1253, 1611, 1927, 2583, 2961, 3759, 5781, 7339, 8413, 11277, 13489, 17343, 22017, 25239, 40467, 51373, 58891, 66051, 75717, 121401, 154119, 176673, 344933, 462357, 530019, 1034799, 2414531, 3104397, 7243593, 21730779]

約数ペア:

[(1, 21730779), (3, 7243593), (7, 3104397), (9, 2414531), (21, 1034799), (41, 530019), (47, 462357), (63, 344933), (123, 176673), (141, 154119), (179, 121401), (287, 75717), (329, 66051), (369, 58891), (423, 51373), (537, 40467), (861, 25239), (987, 22017), (1253, 17343), (1611, 13489), (1927, 11277), (2583, 8413), (2961, 7339), (3759, 5781)]