21488509

素因数分解:

$7^2\times {\mathrm{23}}^2\times {\mathrm{829}}^1$

素因数の和:889

約数の個数: 18

約数和(自身を含む): 26162430

約数和(自身を除く): 4673921

約数列:

[1, 7, 23, 49, 161, 529, 829, 1127, 3703, 5803, 19067, 25921, 40621, 133469, 438541, 934283, 3069787, 21488509]

約数ペア:

[(1, 21488509), (7, 3069787), (23, 934283), (49, 438541), (161, 133469), (529, 40621), (829, 25921), (1127, 19067), (3703, 5803)]