21171248

素因数分解:

$2^4\times 7^1\times {\mathrm{421}}^1\times {\mathrm{449}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 47095200

約数和(自身を除く): 25923952

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 421, 449, 842, 898, 1684, 1796, 2947, 3143, 3368, 3592, 5894, 6286, 6736, 7184, 11788, 12572, 23576, 25144, 47152, 50288, 189029, 378058, 756116, 1323203, 1512232, 2646406, 3024464, 5292812, 10585624, 21171248]

約数ペア:

[(1, 21171248), (2, 10585624), (4, 5292812), (7, 3024464), (8, 2646406), (14, 1512232), (16, 1323203), (28, 756116), (56, 378058), (112, 189029), (421, 50288), (449, 47152), (842, 25144), (898, 23576), (1684, 12572), (1796, 11788), (2947, 7184), (3143, 6736), (3368, 6286), (3592, 5894)]