21985341

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 34771968

約数和(自身を除く): 12786627

約数列:

[1, 3, 7, 21, 43, 97, 129, 251, 291, 301, 679, 753, 903, 1757, 2037, 4171, 5271, 10793, 12513, 24347, 29197, 32379, 73041, 75551, 87591, 170429, 226653, 511287, 1046921, 3140763, 7328447, 21985341]

約数ペア:

[(1, 21985341), (3, 7328447), (7, 3140763), (21, 1046921), (43, 511287), (97, 226653), (129, 170429), (251, 87591), (291, 75551), (301, 73041), (679, 32379), (753, 29197), (903, 24347), (1757, 12513), (2037, 10793), (4171, 5271)]