261121785

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{16787}}^1$

素因数の和:16873

約数の個数: 32

約数和(自身を含む): 449649792

約数和(自身を除く): 188528007

約数列:

[1, 3, 5, 15, 17, 51, 61, 85, 183, 255, 305, 915, 1037, 3111, 5185, 15555, 16787, 50361, 83935, 251805, 285379, 856137, 1024007, 1426895, 3072021, 4280685, 5120035, 15360105, 17408119, 52224357, 87040595, 261121785]

約数ペア:

[(1, 261121785), (3, 87040595), (5, 52224357), (15, 17408119), (17, 15360105), (51, 5120035), (61, 4280685), (85, 3072021), (183, 1426895), (255, 1024007), (305, 856137), (915, 285379), (1037, 251805), (3111, 83935), (5185, 50361), (15555, 16787)]