201921111

素因数分解:

$3^2\times 7^2\times {\mathrm{457871}}^1$

素因数の和:457891

約数の個数: 18

約数和(自身を含む): 339283152

約数和(自身を除く): 137362041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 457871, 1373613, 3205097, 4120839, 9615291, 22435679, 28845873, 67307037, 201921111]

約数ペア:

[(1, 201921111), (3, 67307037), (7, 28845873), (9, 22435679), (21, 9615291), (49, 4120839), (63, 3205097), (147, 1373613), (441, 457871)]