21051723

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 36509184

約数和(自身を除く): 15457461

約数列:

[1, 3, 7, 11, 21, 33, 47, 49, 77, 141, 147, 231, 277, 329, 517, 539, 831, 987, 1551, 1617, 1939, 2303, 3047, 3619, 5817, 6909, 9141, 10857, 13019, 13573, 21329, 25333, 39057, 40719, 63987, 75999, 91133, 143209, 149303, 273399, 429627, 447909, 637931, 1002463, 1913793, 3007389, 7017241, 21051723]

約数ペア:

[(1, 21051723), (3, 7017241), (7, 3007389), (11, 1913793), (21, 1002463), (33, 637931), (47, 447909), (49, 429627), (77, 273399), (141, 149303), (147, 143209), (231, 91133), (277, 75999), (329, 63987), (517, 40719), (539, 39057), (831, 25333), (987, 21329), (1551, 13573), (1617, 13019), (1939, 10857), (2303, 9141), (3047, 6909), (3619, 5817)]