21008211

素因数分解:

$3^1\times 7^2\times {\mathrm{241}}^1\times {\mathrm{593}}^1$

素因数の和:851

約数の個数: 24

約数和(自身を含む): 32774544

約数和(自身を除く): 11766333

約数列:

[1, 3, 7, 21, 49, 147, 241, 593, 723, 1687, 1779, 4151, 5061, 11809, 12453, 29057, 35427, 87171, 142913, 428739, 1000391, 3001173, 7002737, 21008211]

約数ペア:

[(1, 21008211), (3, 7002737), (7, 3001173), (21, 1000391), (49, 428739), (147, 142913), (241, 87171), (593, 35427), (723, 29057), (1687, 12453), (1779, 11809), (4151, 5061)]