81005960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{1499}}^1$

素因数の和:1710

約数の個数: 64

約数和(自身を含む): 209520000

約数和(自身を除く): 128514040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 193, 280, 386, 772, 965, 1351, 1499, 1544, 1930, 2702, 2998, 3860, 5404, 5996, 6755, 7495, 7720, 10493, 10808, 11992, 13510, 14990, 20986, 27020, 29980, 41972, 52465, 54040, 59960, 83944, 104930, 209860, 289307, 419720, 578614, 1157228, 1446535, 2025149, 2314456, 2893070, 4050298, 5786140, 8100596, 10125745, 11572280, 16201192, 20251490, 40502980, 81005960]

約数ペア:

[(1, 81005960), (2, 40502980), (4, 20251490), (5, 16201192), (7, 11572280), (8, 10125745), (10, 8100596), (14, 5786140), (20, 4050298), (28, 2893070), (35, 2314456), (40, 2025149), (56, 1446535), (70, 1157228), (140, 578614), (193, 419720), (280, 289307), (386, 209860), (772, 104930), (965, 83944), (1351, 59960), (1499, 54040), (1544, 52465), (1930, 41972), (2702, 29980), (2998, 27020), (3860, 20986), (5404, 14990), (5996, 13510), (6755, 11992), (7495, 10808), (7720, 10493)]