21612920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11027}}^1$

素因数の和:11052

約数の個数: 48

約数和(自身を含む): 56573640

約数和(自身を除く): 34960720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11027, 22054, 44108, 55135, 77189, 88216, 110270, 154378, 220540, 308756, 385945, 441080, 540323, 617512, 771890, 1080646, 1543780, 2161292, 2701615, 3087560, 4322584, 5403230, 10806460, 21612920]

約数ペア:

[(1, 21612920), (2, 10806460), (4, 5403230), (5, 4322584), (7, 3087560), (8, 2701615), (10, 2161292), (14, 1543780), (20, 1080646), (28, 771890), (35, 617512), (40, 540323), (49, 441080), (56, 385945), (70, 308756), (98, 220540), (140, 154378), (196, 110270), (245, 88216), (280, 77189), (392, 55135), (490, 44108), (980, 22054), (1960, 11027)]