21247856

素因数分解:

$2^4\times 7^1\times {\mathrm{189713}}^1$

素因数の和:189728

約数の個数: 20

約数和(自身を含む): 47049072

約数和(自身を除く): 25801216

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 189713, 379426, 758852, 1327991, 1517704, 2655982, 3035408, 5311964, 10623928, 21247856]

約数ペア:

[(1, 21247856), (2, 10623928), (4, 5311964), (7, 3035408), (8, 2655982), (14, 1517704), (16, 1327991), (28, 758852), (56, 379426), (112, 189713)]