18803920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:260

約数の個数: 80

約数和(自身を含む): 46872000

約数和(自身を除く): 28068080

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 139, 152, 178, 190, 278, 304, 356, 380, 445, 556, 695, 712, 760, 890, 1112, 1390, 1424, 1520, 1691, 1780, 2224, 2641, 2780, 3382, 3560, 5282, 5560, 6764, 7120, 8455, 10564, 11120, 12371, 13205, 13528, 16910, 21128, 24742, 26410, 27056, 33820, 42256, 49484, 52820, 61855, 67640, 98968, 105640, 123710, 135280, 197936, 211280, 235049, 247420, 470098, 494840, 940196, 989680, 1175245, 1880392, 2350490, 3760784, 4700980, 9401960, 18803920]

約数ペア:

[(1, 18803920), (2, 9401960), (4, 4700980), (5, 3760784), (8, 2350490), (10, 1880392), (16, 1175245), (19, 989680), (20, 940196), (38, 494840), (40, 470098), (76, 247420), (80, 235049), (89, 211280), (95, 197936), (139, 135280), (152, 123710), (178, 105640), (190, 98968), (278, 67640), (304, 61855), (356, 52820), (380, 49484), (445, 42256), (556, 33820), (695, 27056), (712, 26410), (760, 24742), (890, 21128), (1112, 16910), (1390, 13528), (1424, 13205), (1520, 12371), (1691, 11120), (1780, 10564), (2224, 8455), (2641, 7120), (2780, 6764), (3382, 5560), (3560, 5282)]