20956465

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{2551}}^1$

素因数の和:2640

約数の個数: 16

約数和(自身を含む): 26459136

約数和(自身を除く): 5502671

約数列:

[1, 5, 31, 53, 155, 265, 1643, 2551, 8215, 12755, 79081, 135203, 395405, 676015, 4191293, 20956465]

約数ペア:

[(1, 20956465), (5, 4191293), (31, 676015), (53, 395405), (155, 135203), (265, 79081), (1643, 12755), (2551, 8215)]