21025485

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{283}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 39696384

約数和(自身を除く): 18670899

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 127, 195, 283, 381, 585, 635, 849, 1143, 1415, 1651, 1905, 2547, 3679, 4245, 4953, 5715, 8255, 11037, 12735, 14859, 18395, 24765, 33111, 35941, 55185, 74295, 107823, 165555, 179705, 323469, 467233, 539115, 1401699, 1617345, 2336165, 4205097, 7008495, 21025485]

約数ペア:

[(1, 21025485), (3, 7008495), (5, 4205097), (9, 2336165), (13, 1617345), (15, 1401699), (39, 539115), (45, 467233), (65, 323469), (117, 179705), (127, 165555), (195, 107823), (283, 74295), (381, 55185), (585, 35941), (635, 33111), (849, 24765), (1143, 18395), (1415, 14859), (1651, 12735), (1905, 11037), (2547, 8255), (3679, 5715), (4245, 4953)]