28130557

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:162

約数の個数: 36

約数和(自身を含む): 36717120

約数和(自身を除く): 8586563

約数列:

[1, 7, 13, 43, 49, 79, 91, 169, 301, 553, 559, 637, 1027, 1183, 2107, 3397, 3871, 3913, 7189, 7267, 8281, 13351, 23779, 27391, 44161, 50323, 50869, 93457, 166453, 309127, 356083, 574093, 654199, 2163889, 4018651, 28130557]

約数ペア:

[(1, 28130557), (7, 4018651), (13, 2163889), (43, 654199), (49, 574093), (79, 356083), (91, 309127), (169, 166453), (301, 93457), (553, 50869), (559, 50323), (637, 44161), (1027, 27391), (1183, 23779), (2107, 13351), (3397, 8281), (3871, 7267), (3913, 7189)]