3964000

素因数分解:

$2^5\times 5^3\times {\mathrm{991}}^1$

素因数の和:1016

約数の個数: 48

約数和(自身を含む): 9749376

約数和(自身を除く): 5785376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 991, 1000, 1982, 2000, 3964, 4000, 4955, 7928, 9910, 15856, 19820, 24775, 31712, 39640, 49550, 79280, 99100, 123875, 158560, 198200, 247750, 396400, 495500, 792800, 991000, 1982000, 3964000]

約数ペア:

[(1, 3964000), (2, 1982000), (4, 991000), (5, 792800), (8, 495500), (10, 396400), (16, 247750), (20, 198200), (25, 158560), (32, 123875), (40, 99100), (50, 79280), (80, 49550), (100, 39640), (125, 31712), (160, 24775), (200, 19820), (250, 15856), (400, 9910), (500, 7928), (800, 4955), (991, 4000), (1000, 3964), (1982, 2000)]