21135856

素因数分解:

$2^4\times 7^2\times {\mathrm{26959}}^1$

素因数の和:26981

約数の個数: 30

約数和(自身を含む): 47638320

約数和(自身を除く): 26502464

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784, 26959, 53918, 107836, 188713, 215672, 377426, 431344, 754852, 1320991, 1509704, 2641982, 3019408, 5283964, 10567928, 21135856]

約数ペア:

[(1, 21135856), (2, 10567928), (4, 5283964), (7, 3019408), (8, 2641982), (14, 1509704), (16, 1320991), (28, 754852), (49, 431344), (56, 377426), (98, 215672), (112, 188713), (196, 107836), (392, 53918), (784, 26959)]