21457689

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1663}}^1$

素因数の和:1717

約数の個数: 32

約数和(自身を含む): 34504704

約数和(自身を除く): 13047015

約数列:

[1, 3, 11, 17, 23, 33, 51, 69, 187, 253, 391, 561, 759, 1173, 1663, 4301, 4989, 12903, 18293, 28271, 38249, 54879, 84813, 114747, 310981, 420739, 650233, 932943, 1262217, 1950699, 7152563, 21457689]

約数ペア:

[(1, 21457689), (3, 7152563), (11, 1950699), (17, 1262217), (23, 932943), (33, 650233), (51, 420739), (69, 310981), (187, 114747), (253, 84813), (391, 54879), (561, 38249), (759, 28271), (1173, 18293), (1663, 12903), (4301, 4989)]