405760

素因数分解:

$2^8\times 5^1\times {\mathrm{317}}^1$

素因数の和:338

約数の個数: 36

約数和(自身を含む): 974988

約数和(自身を除く): 569228

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 317, 320, 634, 640, 1268, 1280, 1585, 2536, 3170, 5072, 6340, 10144, 12680, 20288, 25360, 40576, 50720, 81152, 101440, 202880, 405760]

約数ペア:

[(1, 405760), (2, 202880), (4, 101440), (5, 81152), (8, 50720), (10, 40576), (16, 25360), (20, 20288), (32, 12680), (40, 10144), (64, 6340), (80, 5072), (128, 3170), (160, 2536), (256, 1585), (317, 1280), (320, 1268), (634, 640)]