21978128

素因数分解:

$2^4\times {\mathrm{677}}^1\times {\mathrm{2029}}^1$

素因数の和:2714

約数の個数: 20

約数和(自身を含む): 42666540

約数和(自身を除く): 20688412

約数列:

[1, 2, 4, 8, 16, 677, 1354, 2029, 2708, 4058, 5416, 8116, 10832, 16232, 32464, 1373633, 2747266, 5494532, 10989064, 21978128]

約数ペア:

[(1, 21978128), (2, 10989064), (4, 5494532), (8, 2747266), (16, 1373633), (677, 32464), (1354, 16232), (2029, 10832), (2708, 8116), (4058, 5416)]