21209761

素因数分解:

${\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:372

約数の個数: 16

約数和(自身を含む): 23154768

約数和(自身を除く): 1945007

約数列:

[1, 17, 61, 113, 181, 1037, 1921, 3077, 6893, 11041, 20453, 117181, 187697, 347701, 1247633, 21209761]

約数ペア:

[(1, 21209761), (17, 1247633), (61, 347701), (113, 187697), (181, 117181), (1037, 20453), (1921, 11041), (3077, 6893)]