21239247

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{1667}}^1$

素因数の和:1838

約数の個数: 16

約数和(自身を含む): 29463552

約数和(自身を除く): 8224305

約数列:

[1, 3, 31, 93, 137, 411, 1667, 4247, 5001, 12741, 51677, 155031, 228379, 685137, 7079749, 21239247]

約数ペア:

[(1, 21239247), (3, 7079749), (31, 685137), (93, 228379), (137, 155031), (411, 51677), (1667, 12741), (4247, 5001)]