19905980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{461}}^1$

素因数の和:614

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 24800836

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 127, 170, 254, 340, 461, 508, 635, 922, 1270, 1844, 2159, 2305, 2540, 4318, 4610, 7837, 8636, 9220, 10795, 15674, 21590, 31348, 39185, 43180, 58547, 78370, 117094, 156740, 234188, 292735, 585470, 995299, 1170940, 1990598, 3981196, 4976495, 9952990, 19905980]

約数ペア:

[(1, 19905980), (2, 9952990), (4, 4976495), (5, 3981196), (10, 1990598), (17, 1170940), (20, 995299), (34, 585470), (68, 292735), (85, 234188), (127, 156740), (170, 117094), (254, 78370), (340, 58547), (461, 43180), (508, 39185), (635, 31348), (922, 21590), (1270, 15674), (1844, 10795), (2159, 9220), (2305, 8636), (2540, 7837), (4318, 4610)]