21859047

素因数分解:

$3^2\times 7^3\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:197

約数の個数: 48

約数和(自身を含む): 37710400

約数和(自身を除く): 15851353

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 97, 147, 219, 291, 343, 441, 511, 657, 679, 873, 1029, 1533, 2037, 3087, 3577, 4599, 4753, 6111, 7081, 10731, 14259, 21243, 25039, 32193, 33271, 42777, 49567, 63729, 75117, 99813, 148701, 225351, 299439, 346969, 446103, 1040907, 2428783, 3122721, 7286349, 21859047]

約数ペア:

[(1, 21859047), (3, 7286349), (7, 3122721), (9, 2428783), (21, 1040907), (49, 446103), (63, 346969), (73, 299439), (97, 225351), (147, 148701), (219, 99813), (291, 75117), (343, 63729), (441, 49567), (511, 42777), (657, 33271), (679, 32193), (873, 25039), (1029, 21243), (1533, 14259), (2037, 10731), (3087, 7081), (3577, 6111), (4599, 4753)]