21247324

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{20509}}^1$

素因数の和:20557

約数の個数: 24

約数和(自身を含む): 43645280

約数和(自身を除く): 22397956

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 148, 259, 518, 1036, 20509, 41018, 82036, 143563, 287126, 574252, 758833, 1517666, 3035332, 5311831, 10623662, 21247324]

約数ペア:

[(1, 21247324), (2, 10623662), (4, 5311831), (7, 3035332), (14, 1517666), (28, 758833), (37, 574252), (74, 287126), (148, 143563), (259, 82036), (518, 41018), (1036, 20509)]