28721979

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 51448320

約数和(自身を除く): 22726341

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 43, 99, 117, 129, 143, 173, 297, 351, 387, 429, 473, 519, 559, 1161, 1287, 1419, 1557, 1677, 1903, 2249, 3861, 4257, 4671, 5031, 5709, 6149, 6747, 7439, 12771, 15093, 17127, 18447, 20241, 22317, 24739, 51381, 55341, 60723, 66951, 74217, 81829, 96707, 166023, 200853, 222651, 245487, 290121, 667953, 736461, 870363, 1063777, 2209383, 2611089, 3191331, 9573993, 28721979]

約数ペア:

[(1, 28721979), (3, 9573993), (9, 3191331), (11, 2611089), (13, 2209383), (27, 1063777), (33, 870363), (39, 736461), (43, 667953), (99, 290121), (117, 245487), (129, 222651), (143, 200853), (173, 166023), (297, 96707), (351, 81829), (387, 74217), (429, 66951), (473, 60723), (519, 55341), (559, 51381), (1161, 24739), (1287, 22317), (1419, 20241), (1557, 18447), (1677, 17127), (1903, 15093), (2249, 12771), (3861, 7439), (4257, 6747), (4671, 6149), (5031, 5709)]