21131331

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{8087}}^1$

素因数の和:8170

約数の個数: 16

約数和(自身を含む): 30799104

約数和(自身を除く): 9667773

約数列:

[1, 3, 13, 39, 67, 201, 871, 2613, 8087, 24261, 105131, 315393, 541829, 1625487, 7043777, 21131331]

約数ペア:

[(1, 21131331), (3, 7043777), (13, 1625487), (39, 541829), (67, 315393), (201, 105131), (871, 24261), (2613, 8087)]