21086715

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6361}}^1$

素因数の和:6399

約数の個数: 32

約数和(自身を含む): 38477376

約数和(自身を除く): 17390661

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6361, 19083, 31805, 82693, 95415, 108137, 248079, 324411, 413465, 540685, 1240395, 1405781, 1622055, 4217343, 7028905, 21086715]

約数ペア:

[(1, 21086715), (3, 7028905), (5, 4217343), (13, 1622055), (15, 1405781), (17, 1240395), (39, 540685), (51, 413465), (65, 324411), (85, 248079), (195, 108137), (221, 95415), (255, 82693), (663, 31805), (1105, 19083), (3315, 6361)]