21811713

素因数分解:

$3^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 16895487

約数列:

[1, 3, 7, 11, 21, 33, 41, 47, 49, 77, 123, 141, 147, 231, 287, 329, 343, 451, 517, 539, 861, 987, 1029, 1353, 1551, 1617, 1927, 2009, 2303, 3157, 3619, 3773, 5781, 6027, 6909, 9471, 10857, 11319, 13489, 14063, 16121, 21197, 22099, 25333, 40467, 42189, 48363, 63591, 66297, 75999, 94423, 148379, 154693, 177331, 283269, 445137, 464079, 531993, 660961, 1038653, 1982883, 3115959, 7270571, 21811713]

約数ペア:

[(1, 21811713), (3, 7270571), (7, 3115959), (11, 1982883), (21, 1038653), (33, 660961), (41, 531993), (47, 464079), (49, 445137), (77, 283269), (123, 177331), (141, 154693), (147, 148379), (231, 94423), (287, 75999), (329, 66297), (343, 63591), (451, 48363), (517, 42189), (539, 40467), (861, 25333), (987, 22099), (1029, 21197), (1353, 16121), (1551, 14063), (1617, 13489), (1927, 11319), (2009, 10857), (2303, 9471), (3157, 6909), (3619, 6027), (3773, 5781)]