18979515

素因数分解:

$3^6\times 5^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:191

約数の個数: 56

約数和(自身を含む): 35255808

約数和(自身を除く): 16276293

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 127, 135, 205, 243, 369, 381, 405, 615, 635, 729, 1107, 1143, 1215, 1845, 1905, 3321, 3429, 3645, 5207, 5535, 5715, 9963, 10287, 15621, 16605, 17145, 26035, 29889, 30861, 46863, 49815, 51435, 78105, 92583, 140589, 149445, 154305, 234315, 421767, 462915, 702945, 1265301, 2108835, 3795903, 6326505, 18979515]

約数ペア:

[(1, 18979515), (3, 6326505), (5, 3795903), (9, 2108835), (15, 1265301), (27, 702945), (41, 462915), (45, 421767), (81, 234315), (123, 154305), (127, 149445), (135, 140589), (205, 92583), (243, 78105), (369, 51435), (381, 49815), (405, 46863), (615, 30861), (635, 29889), (729, 26035), (1107, 17145), (1143, 16605), (1215, 15621), (1845, 10287), (1905, 9963), (3321, 5715), (3429, 5535), (3645, 5207)]