21390135

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2551}}^1$

素因数の和:2615

約数の個数: 32

約数和(自身を含む): 37728768

約数和(自身を除く): 16338633

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2551, 2795, 7653, 8385, 12755, 33163, 38265, 99489, 109693, 165815, 329079, 497445, 548465, 1426009, 1645395, 4278027, 7130045, 21390135]

約数ペア:

[(1, 21390135), (3, 7130045), (5, 4278027), (13, 1645395), (15, 1426009), (39, 548465), (43, 497445), (65, 329079), (129, 165815), (195, 109693), (215, 99489), (559, 38265), (645, 33163), (1677, 12755), (2551, 8385), (2795, 7653)]