19908400

素因数分解:

$2^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{701}}^1$

素因数の和:790

約数の個数: 60

約数和(自身を含む): 48572784

約数和(自身を除く): 28664384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 142, 200, 284, 355, 400, 568, 701, 710, 1136, 1402, 1420, 1775, 2804, 2840, 3505, 3550, 5608, 5680, 7010, 7100, 11216, 14020, 14200, 17525, 28040, 28400, 35050, 49771, 56080, 70100, 99542, 140200, 199084, 248855, 280400, 398168, 497710, 796336, 995420, 1244275, 1990840, 2488550, 3981680, 4977100, 9954200, 19908400]

約数ペア:

[(1, 19908400), (2, 9954200), (4, 4977100), (5, 3981680), (8, 2488550), (10, 1990840), (16, 1244275), (20, 995420), (25, 796336), (40, 497710), (50, 398168), (71, 280400), (80, 248855), (100, 199084), (142, 140200), (200, 99542), (284, 70100), (355, 56080), (400, 49771), (568, 35050), (701, 28400), (710, 28040), (1136, 17525), (1402, 14200), (1420, 14020), (1775, 11216), (2804, 7100), (2840, 7010), (3505, 5680), (3550, 5608)]