21170355

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1361}}^1$

素因数の和:1447

約数の個数: 32

約数和(自身を含む): 36479808

約数和(自身を除く): 15309453

約数列:

[1, 3, 5, 15, 17, 51, 61, 85, 183, 255, 305, 915, 1037, 1361, 3111, 4083, 5185, 6805, 15555, 20415, 23137, 69411, 83021, 115685, 249063, 347055, 415105, 1245315, 1411357, 4234071, 7056785, 21170355]

約数ペア:

[(1, 21170355), (3, 7056785), (5, 4234071), (15, 1411357), (17, 1245315), (51, 415105), (61, 347055), (85, 249063), (183, 115685), (255, 83021), (305, 69411), (915, 23137), (1037, 20415), (1361, 15555), (3111, 6805), (4083, 5185)]