2558720

素因数分解:

$2^8\times 5^1\times {\mathrm{1999}}^1$

素因数の和:2020

約数の個数: 36

約数和(自身を含む): 6132000

約数和(自身を除く): 3573280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 1999, 3998, 7996, 9995, 15992, 19990, 31984, 39980, 63968, 79960, 127936, 159920, 255872, 319840, 511744, 639680, 1279360, 2558720]

約数ペア:

[(1, 2558720), (2, 1279360), (4, 639680), (5, 511744), (8, 319840), (10, 255872), (16, 159920), (20, 127936), (32, 79960), (40, 63968), (64, 39980), (80, 31984), (128, 19990), (160, 15992), (256, 9995), (320, 7996), (640, 3998), (1280, 1999)]