80279840

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1999}}^1$

素因数の和:2265

約数の個数: 48

約数和(自身を含む): 190512000

約数和(自身を除く): 110232160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 502, 1004, 1255, 1999, 2008, 2510, 3998, 4016, 5020, 7996, 8032, 9995, 10040, 15992, 19990, 20080, 31984, 39980, 40160, 63968, 79960, 159920, 319840, 501749, 1003498, 2006996, 2508745, 4013992, 5017490, 8027984, 10034980, 16055968, 20069960, 40139920, 80279840]

約数ペア:

[(1, 80279840), (2, 40139920), (4, 20069960), (5, 16055968), (8, 10034980), (10, 8027984), (16, 5017490), (20, 4013992), (32, 2508745), (40, 2006996), (80, 1003498), (160, 501749), (251, 319840), (502, 159920), (1004, 79960), (1255, 63968), (1999, 40160), (2008, 39980), (2510, 31984), (3998, 20080), (4016, 19990), (5020, 15992), (7996, 10040), (8032, 9995)]