20949987

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{307}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 29977024

約数和(自身を除く): 9027037

約数列:

[1, 3, 23, 43, 69, 129, 307, 529, 921, 989, 1587, 2967, 7061, 13201, 21183, 22747, 39603, 68241, 162403, 303623, 487209, 910869, 6983329, 20949987]

約数ペア:

[(1, 20949987), (3, 6983329), (23, 910869), (43, 487209), (69, 303623), (129, 162403), (307, 68241), (529, 39603), (921, 22747), (989, 21183), (1587, 13201), (2967, 7061)]