16648340

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 36288000

約数和(自身を除く): 19639660

約数列:

[1, 2, 4, 5, 10, 20, 47, 89, 94, 178, 188, 199, 235, 356, 398, 445, 470, 796, 890, 940, 995, 1780, 1990, 3980, 4183, 8366, 9353, 16732, 17711, 18706, 20915, 35422, 37412, 41830, 46765, 70844, 83660, 88555, 93530, 177110, 187060, 354220, 832417, 1664834, 3329668, 4162085, 8324170, 16648340]

約数ペア:

[(1, 16648340), (2, 8324170), (4, 4162085), (5, 3329668), (10, 1664834), (20, 832417), (47, 354220), (89, 187060), (94, 177110), (178, 93530), (188, 88555), (199, 83660), (235, 70844), (356, 46765), (398, 41830), (445, 37412), (470, 35422), (796, 20915), (890, 18706), (940, 17711), (995, 16732), (1780, 9353), (1990, 8366), (3980, 4183)]