20172800

素因数分解:

$2^{12}\times 5^2\times {\mathrm{197}}^1$

素因数の和:231

約数の個数: 78

約数和(自身を含む): 50276358

約数和(自身を除く): 30103558

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 197, 200, 256, 320, 394, 400, 512, 640, 788, 800, 985, 1024, 1280, 1576, 1600, 1970, 2048, 2560, 3152, 3200, 3940, 4096, 4925, 5120, 6304, 6400, 7880, 9850, 10240, 12608, 12800, 15760, 19700, 20480, 25216, 25600, 31520, 39400, 50432, 51200, 63040, 78800, 100864, 102400, 126080, 157600, 201728, 252160, 315200, 403456, 504320, 630400, 806912, 1008640, 1260800, 2017280, 2521600, 4034560, 5043200, 10086400, 20172800]

約数ペア:

[(1, 20172800), (2, 10086400), (4, 5043200), (5, 4034560), (8, 2521600), (10, 2017280), (16, 1260800), (20, 1008640), (25, 806912), (32, 630400), (40, 504320), (50, 403456), (64, 315200), (80, 252160), (100, 201728), (128, 157600), (160, 126080), (197, 102400), (200, 100864), (256, 78800), (320, 63040), (394, 51200), (400, 50432), (512, 39400), (640, 31520), (788, 25600), (800, 25216), (985, 20480), (1024, 19700), (1280, 15760), (1576, 12800), (1600, 12608), (1970, 10240), (2048, 9850), (2560, 7880), (3152, 6400), (3200, 6304), (3940, 5120), (4096, 4925)]