21015655

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{433}}^1\times {\mathrm{571}}^1$

素因数の和:1026

約数の個数: 16

約数和(自身を含む): 26810784

約数和(自身を除く): 5795129

約数列:

[1, 5, 17, 85, 433, 571, 2165, 2855, 7361, 9707, 36805, 48535, 247243, 1236215, 4203131, 21015655]

約数ペア:

[(1, 21015655), (5, 4203131), (17, 1236215), (85, 247243), (433, 48535), (571, 36805), (2165, 9707), (2855, 7361)]