21903441

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1367}}^1$

素因数の和:1493

約数の個数: 24

約数和(自身を含む): 34309440

約数和(自身を除く): 12405999

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 1367, 2289, 4101, 5341, 9569, 16023, 28707, 66983, 149003, 200949, 447009, 1043021, 3129063, 7301147, 21903441]

約数ペア:

[(1, 21903441), (3, 7301147), (7, 3129063), (21, 1043021), (49, 447009), (109, 200949), (147, 149003), (327, 66983), (763, 28707), (1367, 16023), (2289, 9569), (4101, 5341)]