21681716

素因数分解:

$2^2\times 7^3\times {\mathrm{15803}}^1$

素因数の和:15828

約数の個数: 24

約数和(自身を含む): 44251200

約数和(自身を除く): 22569484

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 343, 686, 1372, 15803, 31606, 63212, 110621, 221242, 442484, 774347, 1548694, 3097388, 5420429, 10840858, 21681716]

約数ペア:

[(1, 21681716), (2, 10840858), (4, 5420429), (7, 3097388), (14, 1548694), (28, 774347), (49, 442484), (98, 221242), (196, 110621), (343, 63212), (686, 31606), (1372, 15803)]