21488620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{293}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 47910240

約数和(自身を除く): 26421620

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 193, 293, 380, 386, 586, 772, 965, 1172, 1465, 1930, 2930, 3667, 3860, 5567, 5860, 7334, 11134, 14668, 18335, 22268, 27835, 36670, 55670, 56549, 73340, 111340, 113098, 226196, 282745, 565490, 1074431, 1130980, 2148862, 4297724, 5372155, 10744310, 21488620]

約数ペア:

[(1, 21488620), (2, 10744310), (4, 5372155), (5, 4297724), (10, 2148862), (19, 1130980), (20, 1074431), (38, 565490), (76, 282745), (95, 226196), (190, 113098), (193, 111340), (293, 73340), (380, 56549), (386, 55670), (586, 36670), (772, 27835), (965, 22268), (1172, 18335), (1465, 14668), (1930, 11134), (2930, 7334), (3667, 5860), (3860, 5567)]