21269755

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{337}}^1\times {\mathrm{971}}^1$

素因数の和:1326

約数の個数: 16

約数和(自身を含む): 27597024

約数和(自身を除く): 6327269

約数列:

[1, 5, 13, 65, 337, 971, 1685, 4381, 4855, 12623, 21905, 63115, 327227, 1636135, 4253951, 21269755]

約数ペア:

[(1, 21269755), (5, 4253951), (13, 1636135), (65, 327227), (337, 63115), (971, 21905), (1685, 12623), (4381, 4855)]