21102809

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5393}}^1$

素因数の和:5456

約数の個数: 16

約数和(自身を含む): 26581632

約数和(自身を除く): 5478823

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5393, 37751, 70109, 231899, 490763, 1623293, 3014687, 21102809]

約数ペア:

[(1, 21102809), (7, 3014687), (13, 1623293), (43, 490763), (91, 231899), (301, 70109), (559, 37751), (3913, 5393)]