21507717

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 37297152

約数和(自身を除く): 15789435

約数列:

[1, 3, 7, 11, 21, 33, 47, 49, 77, 141, 147, 231, 283, 329, 517, 539, 849, 987, 1551, 1617, 1981, 2303, 3113, 3619, 5943, 6909, 9339, 10857, 13301, 13867, 21791, 25333, 39903, 41601, 65373, 75999, 93107, 146311, 152537, 279321, 438933, 457611, 651749, 1024177, 1955247, 3072531, 7169239, 21507717]

約数ペア:

[(1, 21507717), (3, 7169239), (7, 3072531), (11, 1955247), (21, 1024177), (33, 651749), (47, 457611), (49, 438933), (77, 279321), (141, 152537), (147, 146311), (231, 93107), (283, 75999), (329, 65373), (517, 41601), (539, 39903), (849, 25333), (987, 21791), (1551, 13867), (1617, 13301), (1981, 10857), (2303, 9339), (3113, 6909), (3619, 5943)]