1279360

素因数分解:

$2^7\times 5^1\times {\mathrm{1999}}^1$

素因数の和:2018

約数の個数: 32

約数和(自身を含む): 3060000

約数和(自身を除く): 1780640

約数列:

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

約数ペア:

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