21915671152

素因数分解:

$2^4\times {\mathrm{997}}^1\times {\mathrm{1373851}}^1$

素因数の和:1374856

約数の個数: 20

約数和(自身を含む): 42504233176

約数和(自身を除く): 20588562024

約数列:

[1, 2, 4, 8, 16, 997, 1994, 3988, 7976, 15952, 1373851, 2747702, 5495404, 10990808, 21981616, 1369729447, 2739458894, 5478917788, 10957835576, 21915671152]

約数ペア:

[(1, 21915671152), (2, 10957835576), (4, 5478917788), (8, 2739458894), (16, 1369729447), (997, 21981616), (1994, 10990808), (3988, 5495404), (7976, 2747702), (15952, 1373851)]