18773660

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 40824000

約数和(自身を除く): 22050340

約数列:

[1, 2, 4, 5, 10, 20, 53, 89, 106, 178, 199, 212, 265, 356, 398, 445, 530, 796, 890, 995, 1060, 1780, 1990, 3980, 4717, 9434, 10547, 17711, 18868, 21094, 23585, 35422, 42188, 47170, 52735, 70844, 88555, 94340, 105470, 177110, 210940, 354220, 938683, 1877366, 3754732, 4693415, 9386830, 18773660]

約数ペア:

[(1, 18773660), (2, 9386830), (4, 4693415), (5, 3754732), (10, 1877366), (20, 938683), (53, 354220), (89, 210940), (106, 177110), (178, 105470), (199, 94340), (212, 88555), (265, 70844), (356, 52735), (398, 47170), (445, 42188), (530, 35422), (796, 23585), (890, 21094), (995, 18868), (1060, 17711), (1780, 10547), (1990, 9434), (3980, 4717)]