21509072

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103409}}^1$

素因数の和:103430

約数の個数: 20

約数和(自身を含む): 44879940

約数和(自身を除く): 23370868

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103409, 206818, 413636, 827272, 1344317, 1654544, 2688634, 5377268, 10754536, 21509072]

約数ペア:

[(1, 21509072), (2, 10754536), (4, 5377268), (8, 2688634), (13, 1654544), (16, 1344317), (26, 827272), (52, 413636), (104, 206818), (208, 103409)]