21151724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{647}}^1\times {\mathrm{743}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 40497408

約数和(自身を除く): 19345684

約数列:

[1, 2, 4, 11, 22, 44, 647, 743, 1294, 1486, 2588, 2972, 7117, 8173, 14234, 16346, 28468, 32692, 480721, 961442, 1922884, 5287931, 10575862, 21151724]

約数ペア:

[(1, 21151724), (2, 10575862), (4, 5287931), (11, 1922884), (22, 961442), (44, 480721), (647, 32692), (743, 28468), (1294, 16346), (1486, 14234), (2588, 8173), (2972, 7117)]