21071008

素因数分解:

$2^5\times 7^1\times {\mathrm{109}}^1\times {\mathrm{863}}^1$

素因数の和:989

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26829152

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 109, 112, 218, 224, 436, 763, 863, 872, 1526, 1726, 1744, 3052, 3452, 3488, 6041, 6104, 6904, 12082, 12208, 13808, 24164, 24416, 27616, 48328, 94067, 96656, 188134, 193312, 376268, 658469, 752536, 1316938, 1505072, 2633876, 3010144, 5267752, 10535504, 21071008]

約数ペア:

[(1, 21071008), (2, 10535504), (4, 5267752), (7, 3010144), (8, 2633876), (14, 1505072), (16, 1316938), (28, 752536), (32, 658469), (56, 376268), (109, 193312), (112, 188134), (218, 96656), (224, 94067), (436, 48328), (763, 27616), (863, 24416), (872, 24164), (1526, 13808), (1726, 12208), (1744, 12082), (3052, 6904), (3452, 6104), (3488, 6041)]