20218385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 7457263

約数列:

[1, 5, 11, 43, 55, 83, 103, 215, 415, 473, 515, 913, 1133, 2365, 3569, 4429, 4565, 5665, 8549, 17845, 22145, 39259, 42745, 48719, 94039, 196295, 243595, 367607, 470195, 1838035, 4043677, 20218385]

約数ペア:

[(1, 20218385), (5, 4043677), (11, 1838035), (43, 470195), (55, 367607), (83, 243595), (103, 196295), (215, 94039), (415, 48719), (473, 42745), (515, 39259), (913, 22145), (1133, 17845), (2365, 8549), (3569, 5665), (4429, 4565)]