78784240

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{4999}}^1$

素因数の和:5209

約数の個数: 40

約数和(自身を含む): 184140000

約数和(自身を除く): 105355760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 4999, 7880, 9998, 15760, 19996, 24995, 39992, 49990, 79984, 99980, 199960, 399920, 984803, 1969606, 3939212, 4924015, 7878424, 9848030, 15756848, 19696060, 39392120, 78784240]

約数ペア:

[(1, 78784240), (2, 39392120), (4, 19696060), (5, 15756848), (8, 9848030), (10, 7878424), (16, 4924015), (20, 3939212), (40, 1969606), (80, 984803), (197, 399920), (394, 199960), (788, 99980), (985, 79984), (1576, 49990), (1970, 39992), (3152, 24995), (3940, 19996), (4999, 15760), (7880, 9998)]