99971920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{739}}^1$

素因数の和:860

約数の個数: 80

約数和(自身を含む): 247752000

約数和(自身を除く): 147780080

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 152, 178, 190, 304, 356, 380, 445, 712, 739, 760, 890, 1424, 1478, 1520, 1691, 1780, 2956, 3382, 3560, 3695, 5912, 6764, 7120, 7390, 8455, 11824, 13528, 14041, 14780, 16910, 27056, 28082, 29560, 33820, 56164, 59120, 65771, 67640, 70205, 112328, 131542, 135280, 140410, 224656, 263084, 280820, 328855, 526168, 561640, 657710, 1052336, 1123280, 1249649, 1315420, 2499298, 2630840, 4998596, 5261680, 6248245, 9997192, 12496490, 19994384, 24992980, 49985960, 99971920]

約数ペア:

[(1, 99971920), (2, 49985960), (4, 24992980), (5, 19994384), (8, 12496490), (10, 9997192), (16, 6248245), (19, 5261680), (20, 4998596), (38, 2630840), (40, 2499298), (76, 1315420), (80, 1249649), (89, 1123280), (95, 1052336), (152, 657710), (178, 561640), (190, 526168), (304, 328855), (356, 280820), (380, 263084), (445, 224656), (712, 140410), (739, 135280), (760, 131542), (890, 112328), (1424, 70205), (1478, 67640), (1520, 65771), (1691, 59120), (1780, 56164), (2956, 33820), (3382, 29560), (3560, 28082), (3695, 27056), (5912, 16910), (6764, 14780), (7120, 14041), (7390, 13528), (8455, 11824)]