279440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{499}}^1$

素因数の和:519

約数の個数: 40

約数和(自身を含む): 744000

約数和(自身を除く): 464560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 499, 560, 998, 1996, 2495, 3493, 3992, 4990, 6986, 7984, 9980, 13972, 17465, 19960, 27944, 34930, 39920, 55888, 69860, 139720, 279440]

約数ペア:

[(1, 279440), (2, 139720), (4, 69860), (5, 55888), (7, 39920), (8, 34930), (10, 27944), (14, 19960), (16, 17465), (20, 13972), (28, 9980), (35, 7984), (40, 6986), (56, 4990), (70, 3992), (80, 3493), (112, 2495), (140, 1996), (280, 998), (499, 560)]