3994000

素因数分解:

$2^4\times 5^3\times {\mathrm{1997}}^1$

素因数の和:2020

約数の個数: 40

約数和(自身を含む): 9662328

約数和(自身を除く): 5668328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 1997, 2000, 3994, 7988, 9985, 15976, 19970, 31952, 39940, 49925, 79880, 99850, 159760, 199700, 249625, 399400, 499250, 798800, 998500, 1997000, 3994000]

約数ペア:

[(1, 3994000), (2, 1997000), (4, 998500), (5, 798800), (8, 499250), (10, 399400), (16, 249625), (20, 199700), (25, 159760), (40, 99850), (50, 79880), (80, 49925), (100, 39940), (125, 31952), (200, 19970), (250, 15976), (400, 9985), (500, 7988), (1000, 3994), (1997, 2000)]