21209721

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{8117}}^1$

素因数の和:8200

約数の個数: 16

約数和(自身を含む): 30913344

約数和(自身を除く): 9703623

約数列:

[1, 3, 13, 39, 67, 201, 871, 2613, 8117, 24351, 105521, 316563, 543839, 1631517, 7069907, 21209721]

約数ペア:

[(1, 21209721), (3, 7069907), (13, 1631517), (39, 543839), (67, 316563), (201, 105521), (871, 24351), (2613, 8117)]