20782000

素因数分解:

$2^4\times 5^3\times {\mathrm{10391}}^1$

素因数の和:10414

約数の個数: 40

約数和(自身を含む): 50255712

約数和(自身を除く): 29473712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10391, 20782, 41564, 51955, 83128, 103910, 166256, 207820, 259775, 415640, 519550, 831280, 1039100, 1298875, 2078200, 2597750, 4156400, 5195500, 10391000, 20782000]

約数ペア:

[(1, 20782000), (2, 10391000), (4, 5195500), (5, 4156400), (8, 2597750), (10, 2078200), (16, 1298875), (20, 1039100), (25, 831280), (40, 519550), (50, 415640), (80, 259775), (100, 207820), (125, 166256), (200, 103910), (250, 83128), (400, 51955), (500, 41564), (1000, 20782), (2000, 10391)]