17921393

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{709}}^1$

素因数の和:896

約数の個数: 16

約数和(自身を含む): 21538560

約数和(自身を除く): 3617167

約数列:

[1, 7, 23, 157, 161, 709, 1099, 3611, 4963, 16307, 25277, 111313, 114149, 779191, 2560199, 17921393]

約数ペア:

[(1, 17921393), (7, 2560199), (23, 779191), (157, 114149), (161, 111313), (709, 25277), (1099, 16307), (3611, 4963)]