21888455

素因数分解:

$5^1\times {\mathrm{107}}^1\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:526

約数の個数: 16

約数和(自身を含む): 26780544

約数和(自身を除く): 4892089

約数列:

[1, 5, 107, 163, 251, 535, 815, 1255, 17441, 26857, 40913, 87205, 134285, 204565, 4377691, 21888455]

約数ペア:

[(1, 21888455), (5, 4377691), (107, 204565), (163, 134285), (251, 87205), (535, 40913), (815, 26857), (1255, 17441)]