20129139

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 36

約数和(自身を含む): 31608720

約数和(自身を除く): 11479581

約数列:

[1, 3, 9, 17, 51, 71, 109, 153, 213, 289, 327, 639, 867, 981, 1207, 1853, 2601, 3621, 5559, 7739, 10863, 16677, 20519, 23217, 31501, 61557, 69651, 94503, 131563, 184671, 283509, 394689, 1184067, 2236571, 6709713, 20129139]

約数ペア:

[(1, 20129139), (3, 6709713), (9, 2236571), (17, 1184067), (51, 394689), (71, 283509), (109, 184671), (153, 131563), (213, 94503), (289, 69651), (327, 61557), (639, 31501), (867, 23217), (981, 20519), (1207, 16677), (1853, 10863), (2601, 7739), (3621, 5559)]