21005800

素因数分解:

$2^3\times 5^2\times {\mathrm{127}}^1\times {\mathrm{827}}^1$

素因数の和:970

約数の個数: 48

約数和(自身を含む): 49282560

約数和(自身を除く): 28276760

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 127, 200, 254, 508, 635, 827, 1016, 1270, 1654, 2540, 3175, 3308, 4135, 5080, 6350, 6616, 8270, 12700, 16540, 20675, 25400, 33080, 41350, 82700, 105029, 165400, 210058, 420116, 525145, 840232, 1050290, 2100580, 2625725, 4201160, 5251450, 10502900, 21005800]

約数ペア:

[(1, 21005800), (2, 10502900), (4, 5251450), (5, 4201160), (8, 2625725), (10, 2100580), (20, 1050290), (25, 840232), (40, 525145), (50, 420116), (100, 210058), (127, 165400), (200, 105029), (254, 82700), (508, 41350), (635, 33080), (827, 25400), (1016, 20675), (1270, 16540), (1654, 12700), (2540, 8270), (3175, 6616), (3308, 6350), (4135, 5080)]