20418560

素因数分解:

$2^{12}\times 5^1\times {\mathrm{997}}^1$

素因数の和:1026

約数の個数: 52

約数和(自身を含む): 49047708

約数和(自身を除く): 28629148

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 997, 1024, 1280, 1994, 2048, 2560, 3988, 4096, 4985, 5120, 7976, 9970, 10240, 15952, 19940, 20480, 31904, 39880, 63808, 79760, 127616, 159520, 255232, 319040, 510464, 638080, 1020928, 1276160, 2041856, 2552320, 4083712, 5104640, 10209280, 20418560]

約数ペア:

[(1, 20418560), (2, 10209280), (4, 5104640), (5, 4083712), (8, 2552320), (10, 2041856), (16, 1276160), (20, 1020928), (32, 638080), (40, 510464), (64, 319040), (80, 255232), (128, 159520), (160, 127616), (256, 79760), (320, 63808), (512, 39880), (640, 31904), (997, 20480), (1024, 19940), (1280, 15952), (1994, 10240), (2048, 9970), (2560, 7976), (3988, 5120), (4096, 4985)]