21778425

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2251}}^1$

素因数の和:2310

約数の個数: 36

約数和(自身を含む): 39932464

約数和(自身を除く): 18154039

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2251, 3225, 6753, 9675, 11255, 20259, 33765, 56275, 96793, 101295, 168825, 290379, 483965, 506475, 871137, 1451895, 2419825, 4355685, 7259475, 21778425]

約数ペア:

[(1, 21778425), (3, 7259475), (5, 4355685), (9, 2419825), (15, 1451895), (25, 871137), (43, 506475), (45, 483965), (75, 290379), (129, 168825), (215, 101295), (225, 96793), (387, 56275), (645, 33765), (1075, 20259), (1935, 11255), (2251, 9675), (3225, 6753)]