21017836

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{15971}}^1$

素因数の和:16029

約数の個数: 24

約数和(自身を含む): 42932736

約数和(自身を除く): 21914900

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 15971, 31942, 63884, 111797, 223594, 447188, 750637, 1501274, 3002548, 5254459, 10508918, 21017836]

約数ペア:

[(1, 21017836), (2, 10508918), (4, 5254459), (7, 3002548), (14, 1501274), (28, 750637), (47, 447188), (94, 223594), (188, 111797), (329, 63884), (658, 31942), (1316, 15971)]