2178712880

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{305999}}^1$

素因数の和:306101

約数の個数: 40

約数和(自身を含む): 5122440000

約数和(自身を除く): 2943727120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120, 305999, 611998, 1223996, 1529995, 2447992, 3059990, 4895984, 6119980, 12239960, 24479920, 27233911, 54467822, 108935644, 136169555, 217871288, 272339110, 435742576, 544678220, 1089356440, 2178712880]

約数ペア:

[(1, 2178712880), (2, 1089356440), (4, 544678220), (5, 435742576), (8, 272339110), (10, 217871288), (16, 136169555), (20, 108935644), (40, 54467822), (80, 27233911), (89, 24479920), (178, 12239960), (356, 6119980), (445, 4895984), (712, 3059990), (890, 2447992), (1424, 1529995), (1780, 1223996), (3560, 611998), (7120, 305999)]