21000751191

素因数分解:

$3^2\times 7^2\times {\mathrm{47620751}}^1$

素因数の和:47620771

約数の個数: 18

約数和(自身を含む): 35286977232

約数和(自身を除く): 14286226041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47620751, 142862253, 333345257, 428586759, 1000035771, 2333416799, 3000107313, 7000250397, 21000751191]

約数ペア:

[(1, 21000751191), (3, 7000250397), (7, 3000107313), (9, 2333416799), (21, 1000035771), (49, 428586759), (63, 333345257), (147, 142862253), (441, 47620751)]