406400

素因数分解:

$2^7\times 5^2\times {\mathrm{127}}^1$

素因数の和:151

約数の個数: 48

約数和(自身を含む): 1011840

約数和(自身を除く): 605440

約数列:

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

約数ペア:

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