20789800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5471}}^1$

素因数の和:5506

約数の個数: 48

約数和(自身を含む): 50889600

約数和(自身を除く): 30099800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5471, 10942, 21884, 27355, 43768, 54710, 103949, 109420, 136775, 207898, 218840, 273550, 415796, 519745, 547100, 831592, 1039490, 1094200, 2078980, 2598725, 4157960, 5197450, 10394900, 20789800]

約数ペア:

[(1, 20789800), (2, 10394900), (4, 5197450), (5, 4157960), (8, 2598725), (10, 2078980), (19, 1094200), (20, 1039490), (25, 831592), (38, 547100), (40, 519745), (50, 415796), (76, 273550), (95, 218840), (100, 207898), (152, 136775), (190, 109420), (200, 103949), (380, 54710), (475, 43768), (760, 27355), (950, 21884), (1900, 10942), (3800, 5471)]