81853919

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{19853}}^1$

素因数の和:19910

約数の個数: 16

約数和(自身を含む): 101652480

約数和(自身を除く): 19798561

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 19853, 138971, 377207, 615443, 2640449, 4308101, 11693417, 81853919]

約数ペア:

[(1, 81853919), (7, 11693417), (19, 4308101), (31, 2640449), (133, 615443), (217, 377207), (589, 138971), (4123, 19853)]