21605555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{1619}}^1$

素因数の和:1798

約数の個数: 16

約数和(自身を含む): 27643680

約数和(自身を除く): 6038125

約数列:

[1, 5, 17, 85, 157, 785, 1619, 2669, 8095, 13345, 27523, 137615, 254183, 1270915, 4321111, 21605555]

約数ペア:

[(1, 21605555), (5, 4321111), (17, 1270915), (85, 254183), (157, 137615), (785, 27523), (1619, 13345), (2669, 8095)]