21978187

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{6073}}^1$

素因数の和:6138

約数の個数: 16

約数和(自身を含む): 27988992

約数和(自身を除く): 6010805

約数列:

[1, 7, 11, 47, 77, 329, 517, 3619, 6073, 42511, 66803, 285431, 467621, 1998017, 3139741, 21978187]

約数ペア:

[(1, 21978187), (7, 3139741), (11, 1998017), (47, 467621), (77, 285431), (329, 66803), (517, 42511), (3619, 6073)]