81640208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{1009}}^1$

素因数の和:1419

約数の個数: 40

約数和(自身を含む): 170952600

約数和(自身を除く): 89312392

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 389, 778, 1009, 1556, 2018, 3112, 4036, 5057, 6224, 8072, 10114, 13117, 16144, 20228, 26234, 40456, 52468, 80912, 104936, 209872, 392501, 785002, 1570004, 3140008, 5102513, 6280016, 10205026, 20410052, 40820104, 81640208]

約数ペア:

[(1, 81640208), (2, 40820104), (4, 20410052), (8, 10205026), (13, 6280016), (16, 5102513), (26, 3140008), (52, 1570004), (104, 785002), (208, 392501), (389, 209872), (778, 104936), (1009, 80912), (1556, 52468), (2018, 40456), (3112, 26234), (4036, 20228), (5057, 16144), (6224, 13117), (8072, 10114)]