21157563

素因数分解:

$3^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{883}}^1$

素因数の和:1063

約数の個数: 24

約数和(自身を含む): 33054528

約数和(自身を除く): 11896965

約数列:

[1, 3, 7, 21, 49, 147, 163, 489, 883, 1141, 2649, 3423, 6181, 7987, 18543, 23961, 43267, 129801, 143929, 431787, 1007503, 3022509, 7052521, 21157563]

約数ペア:

[(1, 21157563), (3, 7052521), (7, 3022509), (21, 1007503), (49, 431787), (147, 143929), (163, 129801), (489, 43267), (883, 23961), (1141, 18543), (2649, 7987), (3423, 6181)]