21564784

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{499}}^1$

素因数の和:617

約数の個数: 40

約数和(自身を含む): 43586000

約数和(自身を除く): 22021216

約数列:

[1, 2, 4, 8, 16, 37, 73, 74, 146, 148, 292, 296, 499, 584, 592, 998, 1168, 1996, 2701, 3992, 5402, 7984, 10804, 18463, 21608, 36427, 36926, 43216, 72854, 73852, 145708, 147704, 291416, 295408, 582832, 1347799, 2695598, 5391196, 10782392, 21564784]

約数ペア:

[(1, 21564784), (2, 10782392), (4, 5391196), (8, 2695598), (16, 1347799), (37, 582832), (73, 295408), (74, 291416), (146, 147704), (148, 145708), (292, 73852), (296, 72854), (499, 43216), (584, 36926), (592, 36427), (998, 21608), (1168, 18463), (1996, 10804), (2701, 7984), (3992, 5402)]