21460940

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1307}}^1$

素因数の和:2137

約数の個数: 24

約数和(自身を含む): 45157392

約数和(自身を除く): 23696452

約数列:

[1, 2, 4, 5, 10, 20, 821, 1307, 1642, 2614, 3284, 4105, 5228, 6535, 8210, 13070, 16420, 26140, 1073047, 2146094, 4292188, 5365235, 10730470, 21460940]

約数ペア:

[(1, 21460940), (2, 10730470), (4, 5365235), (5, 4292188), (10, 2146094), (20, 1073047), (821, 26140), (1307, 16420), (1642, 13070), (2614, 8210), (3284, 6535), (4105, 5228)]