21217091

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2381}}^1$

素因数の和:2474

約数の個数: 16

約数和(自身を含む): 25916160

約数和(自身を除く): 4699069

約数列:

[1, 7, 19, 67, 133, 469, 1273, 2381, 8911, 16667, 45239, 159527, 316673, 1116689, 3031013, 21217091]

約数ペア:

[(1, 21217091), (7, 3031013), (19, 1116689), (67, 316673), (133, 159527), (469, 45239), (1273, 16667), (2381, 8911)]