21728556

素因数分解:

$2^2\times 3^2\times {\mathrm{71}}^1\times {\mathrm{8501}}^1$

素因数の和:8582

約数の個数: 36

約数和(自身を含む): 55705104

約数和(自身を除く): 33976548

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 142, 213, 284, 426, 639, 852, 1278, 2556, 8501, 17002, 25503, 34004, 51006, 76509, 102012, 153018, 306036, 603571, 1207142, 1810713, 2414284, 3621426, 5432139, 7242852, 10864278, 21728556]

約数ペア:

[(1, 21728556), (2, 10864278), (3, 7242852), (4, 5432139), (6, 3621426), (9, 2414284), (12, 1810713), (18, 1207142), (36, 603571), (71, 306036), (142, 153018), (213, 102012), (284, 76509), (426, 51006), (639, 34004), (852, 25503), (1278, 17002), (2556, 8501)]