21304563

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3917}}^1$

素因数の和:3971

約数の個数: 24

約数和(自身を含む): 33945552

約数和(自身を除く): 12640989

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3917, 5439, 11751, 27419, 82257, 144929, 191933, 434787, 575799, 1014503, 3043509, 7101521, 21304563]

約数ペア:

[(1, 21304563), (3, 7101521), (7, 3043509), (21, 1014503), (37, 575799), (49, 434787), (111, 191933), (147, 144929), (259, 82257), (777, 27419), (1813, 11751), (3917, 5439)]