21137836

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{263}}^1\times {\mathrm{283}}^1$

素因数の和:621

約数の個数: 24

約数和(自身を含む): 37787904

約数和(自身を除く): 16650068

約数列:

[1, 2, 4, 71, 142, 263, 283, 284, 526, 566, 1052, 1132, 18673, 20093, 37346, 40186, 74429, 74692, 80372, 148858, 297716, 5284459, 10568918, 21137836]

約数ペア:

[(1, 21137836), (2, 10568918), (4, 5284459), (71, 297716), (142, 148858), (263, 80372), (283, 74692), (284, 74429), (526, 40186), (566, 37346), (1052, 20093), (1132, 18673)]