21425288

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{787}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 41700960

約数和(自身を除く): 20275672

約数列:

[1, 2, 4, 8, 41, 82, 83, 164, 166, 328, 332, 664, 787, 1574, 3148, 3403, 6296, 6806, 13612, 27224, 32267, 64534, 65321, 129068, 130642, 258136, 261284, 522568, 2678161, 5356322, 10712644, 21425288]

約数ペア:

[(1, 21425288), (2, 10712644), (4, 5356322), (8, 2678161), (41, 522568), (82, 261284), (83, 258136), (164, 130642), (166, 129068), (328, 65321), (332, 64534), (664, 32267), (787, 27224), (1574, 13612), (3148, 6806), (3403, 6296)]