21755853

素因数分解:

$3^2\times 7^2\times {\mathrm{49333}}^1$

素因数の和:49353

約数の個数: 18

約数和(自身を含む): 36556494

約数和(自身を除く): 14800641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 49333, 147999, 345331, 443997, 1035993, 2417317, 3107979, 7251951, 21755853]

約数ペア:

[(1, 21755853), (3, 7251951), (7, 3107979), (9, 2417317), (21, 1035993), (49, 443997), (63, 345331), (147, 147999), (441, 49333)]