21729448

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{113}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 45318420

約数和(自身を除く): 23588972

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 113, 172, 226, 344, 452, 559, 904, 1118, 1469, 1849, 2236, 2938, 3698, 4472, 4859, 5876, 7396, 9718, 11752, 14792, 19436, 24037, 38872, 48074, 63167, 96148, 126334, 192296, 208937, 252668, 417874, 505336, 835748, 1671496, 2716181, 5432362, 10864724, 21729448]

約数ペア:

[(1, 21729448), (2, 10864724), (4, 5432362), (8, 2716181), (13, 1671496), (26, 835748), (43, 505336), (52, 417874), (86, 252668), (104, 208937), (113, 192296), (172, 126334), (226, 96148), (344, 63167), (452, 48074), (559, 38872), (904, 24037), (1118, 19436), (1469, 14792), (1849, 11752), (2236, 9718), (2938, 7396), (3698, 5876), (4472, 4859)]