18747455

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{839}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 23284800

約数和(自身を除く): 4537345

約数列:

[1, 5, 41, 109, 205, 545, 839, 4195, 4469, 22345, 34399, 91451, 171995, 457255, 3749491, 18747455]

約数ペア:

[(1, 18747455), (5, 3749491), (41, 457255), (109, 171995), (205, 91451), (545, 34399), (839, 22345), (4195, 4469)]