21008140

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{19819}}^1$

素因数の和:19881

約数の個数: 24

約数和(自身を含む): 44951760

約数和(自身を除く): 23943620

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 19819, 39638, 79276, 99095, 198190, 396380, 1050407, 2100814, 4201628, 5252035, 10504070, 21008140]

約数ペア:

[(1, 21008140), (2, 10504070), (4, 5252035), (5, 4201628), (10, 2100814), (20, 1050407), (53, 396380), (106, 198190), (212, 99095), (265, 79276), (530, 39638), (1060, 19819)]