21871685

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{8461}}^1$

素因数の和:8524

約数の個数: 16

約数和(自身を含む): 29244672

約数和(自身を除く): 7372987

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 8461, 42305, 93071, 397667, 465355, 1988335, 4374337, 21871685]

約数ペア:

[(1, 21871685), (5, 4374337), (11, 1988335), (47, 465355), (55, 397667), (235, 93071), (517, 42305), (2585, 8461)]