28193390

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{39709}}^1$

素因数の和:39787

約数の個数: 16

約数和(自身を含む): 51464160

約数和(自身を除く): 23270770

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 39709, 79418, 198545, 397090, 2819339, 5638678, 14096695, 28193390]

約数ペア:

[(1, 28193390), (2, 14096695), (5, 5638678), (10, 2819339), (71, 397090), (142, 198545), (355, 79418), (710, 39709)]