21267425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{307}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 28185696

約数和(自身を除く): 6918271

約数列:

[1, 5, 17, 25, 85, 163, 307, 425, 815, 1535, 2771, 4075, 5219, 7675, 13855, 26095, 50041, 69275, 130475, 250205, 850697, 1251025, 4253485, 21267425]

約数ペア:

[(1, 21267425), (5, 4253485), (17, 1251025), (25, 850697), (85, 250205), (163, 130475), (307, 69275), (425, 50041), (815, 26095), (1535, 13855), (2771, 7675), (4075, 5219)]