19720144

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28663}}^1$

素因数の和:28714

約数の個数: 20

約数和(自身を含む): 39097696

約数和(自身を除く): 19377552

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28663, 57326, 114652, 229304, 458608, 1232509, 2465018, 4930036, 9860072, 19720144]

約数ペア:

[(1, 19720144), (2, 9860072), (4, 4930036), (8, 2465018), (16, 1232509), (43, 458608), (86, 229304), (172, 114652), (344, 57326), (688, 28663)]