21812788

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 39032000

約数和(自身を除く): 17219212

約数列:

[1, 2, 4, 67, 134, 199, 268, 398, 409, 796, 818, 1636, 13333, 26666, 27403, 53332, 54806, 81391, 109612, 162782, 325564, 5453197, 10906394, 21812788]

約数ペア:

[(1, 21812788), (2, 10906394), (4, 5453197), (67, 325564), (134, 162782), (199, 109612), (268, 81391), (398, 54806), (409, 53332), (796, 27403), (818, 26666), (1636, 13333)]