31991000

素因数分解:

$2^3\times 5^3\times {\mathrm{31991}}^1$

素因数の和:32012

約数の個数: 32

約数和(自身を含む): 74861280

約数和(自身を除く): 42870280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 31991, 63982, 127964, 159955, 255928, 319910, 639820, 799775, 1279640, 1599550, 3199100, 3998875, 6398200, 7997750, 15995500, 31991000]

約数ペア:

[(1, 31991000), (2, 15995500), (4, 7997750), (5, 6398200), (8, 3998875), (10, 3199100), (20, 1599550), (25, 1279640), (40, 799775), (50, 639820), (100, 319910), (125, 255928), (200, 159955), (250, 127964), (500, 63982), (1000, 31991)]