21200145

素因数分解:

$3^1\times 5^1\times {\mathrm{827}}^1\times {\mathrm{1709}}^1$

素因数の和:2544

約数の個数: 16

約数和(自身を含む): 33981120

約数和(自身を除く): 12780975

約数列:

[1, 3, 5, 15, 827, 1709, 2481, 4135, 5127, 8545, 12405, 25635, 1413343, 4240029, 7066715, 21200145]

約数ペア:

[(1, 21200145), (3, 7066715), (5, 4240029), (15, 1413343), (827, 25635), (1709, 12405), (2481, 8545), (4135, 5127)]