21986975

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{181}}^1$

素因数の和:347

約数の個数: 24

約数和(自身を含む): 28300272

約数和(自身を除く): 6313297

約数列:

[1, 5, 25, 43, 113, 181, 215, 565, 905, 1075, 2825, 4525, 4859, 7783, 20453, 24295, 38915, 102265, 121475, 194575, 511325, 879479, 4397395, 21986975]

約数ペア:

[(1, 21986975), (5, 4397395), (25, 879479), (43, 511325), (113, 194575), (181, 121475), (215, 102265), (565, 38915), (905, 24295), (1075, 20453), (2825, 7783), (4525, 4859)]