812800

素因数分解:

$2^8\times 5^2\times {\mathrm{127}}^1$

素因数の和:153

約数の個数: 54

約数和(自身を含む): 2027648

約数和(自身を除く): 1214848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 127, 128, 160, 200, 254, 256, 320, 400, 508, 635, 640, 800, 1016, 1270, 1280, 1600, 2032, 2540, 3175, 3200, 4064, 5080, 6350, 6400, 8128, 10160, 12700, 16256, 20320, 25400, 32512, 40640, 50800, 81280, 101600, 162560, 203200, 406400, 812800]

約数ペア:

[(1, 812800), (2, 406400), (4, 203200), (5, 162560), (8, 101600), (10, 81280), (16, 50800), (20, 40640), (25, 32512), (32, 25400), (40, 20320), (50, 16256), (64, 12700), (80, 10160), (100, 8128), (127, 6400), (128, 6350), (160, 5080), (200, 4064), (254, 3200), (256, 3175), (320, 2540), (400, 2032), (508, 1600), (635, 1280), (640, 1270), (800, 1016)]