21491071

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{463}}^1$

素因数の和:838

約数の個数: 16

約数和(自身を含む): 25984000

約数和(自身を除く): 4492929

約数列:

[1, 7, 19, 133, 349, 463, 2443, 3241, 6631, 8797, 46417, 61579, 161587, 1131109, 3070153, 21491071]

約数ペア:

[(1, 21491071), (7, 3070153), (19, 1131109), (133, 161587), (349, 61579), (463, 46417), (2443, 8797), (3241, 6631)]