28720041

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{9839}}^1$

素因数の和:9988

約数の個数: 16

約数和(自身を含む): 44083200

約数和(自身を除く): 15363159

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 9839, 29517, 68873, 206619, 1367621, 4102863, 9573347, 28720041]

約数ペア:

[(1, 28720041), (3, 9573347), (7, 4102863), (21, 1367621), (139, 206619), (417, 68873), (973, 29517), (2919, 9839)]