206865981

素因数分解:

$3^4\times 7^1\times {\mathrm{397}}^1\times {\mathrm{919}}^1$

素因数の和:1335

約数の個数: 40

約数和(自身を含む): 354442880

約数和(自身を除く): 147576899

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 397, 567, 919, 1191, 2757, 2779, 3573, 6433, 8271, 8337, 10719, 19299, 24813, 25011, 32157, 57897, 74439, 75033, 173691, 225099, 364843, 521073, 1094529, 2553901, 3283587, 7661703, 9850761, 22985109, 29552283, 68955327, 206865981]

約数ペア:

[(1, 206865981), (3, 68955327), (7, 29552283), (9, 22985109), (21, 9850761), (27, 7661703), (63, 3283587), (81, 2553901), (189, 1094529), (397, 521073), (567, 364843), (919, 225099), (1191, 173691), (2757, 75033), (2779, 74439), (3573, 57897), (6433, 32157), (8271, 25011), (8337, 24813), (10719, 19299)]