21945895

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{307}}^1$

素因数の和:387

約数の個数: 24

約数和(自身を含む): 28972944

約数和(自身を除く): 7027049

約数列:

[1, 5, 17, 29, 85, 145, 307, 493, 841, 1535, 2465, 4205, 5219, 8903, 14297, 26095, 44515, 71485, 151351, 258187, 756755, 1290935, 4389179, 21945895]

約数ペア:

[(1, 21945895), (5, 4389179), (17, 1290935), (29, 756755), (85, 258187), (145, 151351), (307, 71485), (493, 44515), (841, 26095), (1535, 14297), (2465, 8903), (4205, 5219)]