21531568

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{25391}}^1$

素因数の和:25452

約数の個数: 20

約数和(自身を含む): 42506208

約数和(自身を除く): 20974640

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 25391, 50782, 101564, 203128, 406256, 1345723, 2691446, 5382892, 10765784, 21531568]

約数ペア:

[(1, 21531568), (2, 10765784), (4, 5382892), (8, 2691446), (16, 1345723), (53, 406256), (106, 203128), (212, 101564), (424, 50782), (848, 25391)]