20448729

素因数分解:

$3^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{521}}^1$

素因数の和:630

約数の個数: 36

約数和(自身を含む): 34812180

約数和(自身を除く): 14363451

約数列:

[1, 3, 7, 9, 21, 49, 63, 89, 147, 267, 441, 521, 623, 801, 1563, 1869, 3647, 4361, 4689, 5607, 10941, 13083, 25529, 32823, 39249, 46369, 76587, 139107, 229761, 324583, 417321, 973749, 2272081, 2921247, 6816243, 20448729]

約数ペア:

[(1, 20448729), (3, 6816243), (7, 2921247), (9, 2272081), (21, 973749), (49, 417321), (63, 324583), (89, 229761), (147, 139107), (267, 76587), (441, 46369), (521, 39249), (623, 32823), (801, 25529), (1563, 13083), (1869, 10941), (3647, 5607), (4361, 4689)]