21142876

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 37665936

約数和(自身を除く): 16523060

約数列:

[1, 2, 4, 131, 157, 257, 262, 314, 514, 524, 628, 1028, 20567, 33667, 40349, 41134, 67334, 80698, 82268, 134668, 161396, 5285719, 10571438, 21142876]

約数ペア:

[(1, 21142876), (2, 10571438), (4, 5285719), (131, 161396), (157, 134668), (257, 82268), (262, 80698), (314, 67334), (514, 41134), (524, 40349), (628, 33667), (1028, 20567)]