21172263

素因数分解:

$3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1973}}^1$

素因数の和:2063

約数の個数: 24

約数和(自身を含む): 33305328

約数和(自身を除く): 12133065

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 511, 1533, 1973, 3577, 5919, 10731, 13811, 41433, 96677, 144029, 290031, 432087, 1008203, 3024609, 7057421, 21172263]

約数ペア:

[(1, 21172263), (3, 7057421), (7, 3024609), (21, 1008203), (49, 432087), (73, 290031), (147, 144029), (219, 96677), (511, 41433), (1533, 13811), (1973, 10731), (3577, 5919)]