21856135

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{337}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 32123520

約数和(自身を除く): 10267385

約数列:

[1, 5, 7, 17, 35, 85, 109, 119, 337, 545, 595, 763, 1685, 1853, 2359, 3815, 5729, 9265, 11795, 12971, 28645, 36733, 40103, 64855, 183665, 200515, 257131, 624461, 1285655, 3122305, 4371227, 21856135]

約数ペア:

[(1, 21856135), (5, 4371227), (7, 3122305), (17, 1285655), (35, 624461), (85, 257131), (109, 200515), (119, 183665), (337, 64855), (545, 40103), (595, 36733), (763, 28645), (1685, 12971), (1853, 11795), (2359, 9265), (3815, 5729)]