399653440

素因数分解:

$2^6\times 5^1\times {\mathrm{1248917}}^1$

素因数の和:1248934

約数の個数: 28

約数和(自身を含む): 951675516

約数和(自身を除く): 552022076

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1248917, 2497834, 4995668, 6244585, 9991336, 12489170, 19982672, 24978340, 39965344, 49956680, 79930688, 99913360, 199826720, 399653440]

約数ペア:

[(1, 399653440), (2, 199826720), (4, 99913360), (5, 79930688), (8, 49956680), (10, 39965344), (16, 24978340), (20, 19982672), (32, 12489170), (40, 9991336), (64, 6244585), (80, 4995668), (160, 2497834), (320, 1248917)]