19966660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{142619}}^1$

素因数の和:142635

約数の個数: 24

約数和(自身を含む): 47920320

約数和(自身を除く): 27953660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 142619, 285238, 570476, 713095, 998333, 1426190, 1996666, 2852380, 3993332, 4991665, 9983330, 19966660]

約数ペア:

[(1, 19966660), (2, 9983330), (4, 4991665), (5, 3993332), (7, 2852380), (10, 1996666), (14, 1426190), (20, 998333), (28, 713095), (35, 570476), (70, 285238), (140, 142619)]