21909951

素因数分解:

$3^2\times 7^1\times {\mathrm{457}}^1\times {\mathrm{761}}^1$

素因数の和:1231

約数の個数: 24

約数和(自身を含む): 36295584

約数和(自身を除く): 14385633

約数列:

[1, 3, 7, 9, 21, 63, 457, 761, 1371, 2283, 3199, 4113, 5327, 6849, 9597, 15981, 28791, 47943, 347777, 1043331, 2434439, 3129993, 7303317, 21909951]

約数ペア:

[(1, 21909951), (3, 7303317), (7, 3129993), (9, 2434439), (21, 1043331), (63, 347777), (457, 47943), (761, 28791), (1371, 15981), (2283, 9597), (3199, 6849), (4113, 5327)]