81425380

素因数分解:

$2^2\times 5^1\times {\mathrm{1481}}^1\times {\mathrm{2749}}^1$

素因数の和:4239

約数の個数: 24

約数和(自身を含む): 171171000

約数和(自身を除く): 89745620

約数列:

[1, 2, 4, 5, 10, 20, 1481, 2749, 2962, 5498, 5924, 7405, 10996, 13745, 14810, 27490, 29620, 54980, 4071269, 8142538, 16285076, 20356345, 40712690, 81425380]

約数ペア:

[(1, 81425380), (2, 40712690), (4, 20356345), (5, 16285076), (10, 8142538), (20, 4071269), (1481, 54980), (2749, 29620), (2962, 27490), (5498, 14810), (5924, 13745), (7405, 10996)]