21197827

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{3361}}^1$

素因数の和:3438

約数の個数: 16

約数和(自身を含む): 26142912

約数和(自身を除く): 4945085

約数列:

[1, 7, 17, 53, 119, 371, 901, 3361, 6307, 23527, 57137, 178133, 399959, 1246931, 3028261, 21197827]

約数ペア:

[(1, 21197827), (7, 3028261), (17, 1246931), (53, 399959), (119, 178133), (371, 57137), (901, 23527), (3361, 6307)]