20866540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25447}}^1$

素因数の和:25497

約数の個数: 24

約数和(自身を含む): 44890272

約数和(自身を除く): 24023732

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25447, 50894, 101788, 127235, 254470, 508940, 1043327, 2086654, 4173308, 5216635, 10433270, 20866540]

約数ペア:

[(1, 20866540), (2, 10433270), (4, 5216635), (5, 4173308), (10, 2086654), (20, 1043327), (41, 508940), (82, 254470), (164, 127235), (205, 101788), (410, 50894), (820, 25447)]