21191908

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{337}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 37856000

約数和(自身を除く): 16664092

約数列:

[1, 2, 4, 79, 158, 199, 316, 337, 398, 674, 796, 1348, 15721, 26623, 31442, 53246, 62884, 67063, 106492, 134126, 268252, 5297977, 10595954, 21191908]

約数ペア:

[(1, 21191908), (2, 10595954), (4, 5297977), (79, 268252), (158, 134126), (199, 106492), (316, 67063), (337, 62884), (398, 53246), (674, 31442), (796, 26623), (1348, 15721)]