21484340

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7841}}^1$

素因数の和:7987

約数の個数: 24

約数和(自身を含む): 45452232

約数和(自身を除く): 23967892

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7841, 15682, 31364, 39205, 78410, 156820, 1074217, 2148434, 4296868, 5371085, 10742170, 21484340]

約数ペア:

[(1, 21484340), (2, 10742170), (4, 5371085), (5, 4296868), (10, 2148434), (20, 1074217), (137, 156820), (274, 78410), (548, 39205), (685, 31364), (1370, 15682), (2740, 7841)]