217989620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{265841}}^1$

素因数の和:265891

約数の個数: 24

約数和(自身を含む): 468945288

約数和(自身を除く): 250955668

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 265841, 531682, 1063364, 1329205, 2658410, 5316820, 10899481, 21798962, 43597924, 54497405, 108994810, 217989620]

約数ペア:

[(1, 217989620), (2, 108994810), (4, 54497405), (5, 43597924), (10, 21798962), (20, 10899481), (41, 5316820), (82, 2658410), (164, 1329205), (205, 1063364), (410, 531682), (820, 265841)]