21198681

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{283}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 37215360

約数和(自身を除く): 16016679

約数列:

[1, 3, 7, 9, 21, 29, 41, 63, 87, 123, 203, 261, 283, 287, 369, 609, 849, 861, 1189, 1827, 1981, 2547, 2583, 3567, 5943, 8207, 8323, 10701, 11603, 17829, 24621, 24969, 34809, 57449, 73863, 74907, 81221, 104427, 172347, 243663, 336487, 517041, 730989, 1009461, 2355409, 3028383, 7066227, 21198681]

約数ペア:

[(1, 21198681), (3, 7066227), (7, 3028383), (9, 2355409), (21, 1009461), (29, 730989), (41, 517041), (63, 336487), (87, 243663), (123, 172347), (203, 104427), (261, 81221), (283, 74907), (287, 73863), (369, 57449), (609, 34809), (849, 24969), (861, 24621), (1189, 17829), (1827, 11603), (1981, 10701), (2547, 8323), (2583, 8207), (3567, 5943)]