20782371440

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2045509}}^1$

素因数の和:2045649

約数の個数: 40

約数和(自身を含む): 48699502080

約数和(自身を除く): 27917130640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2540, 5080, 10160, 2045509, 4091018, 8182036, 10227545, 16364072, 20455090, 32728144, 40910180, 81820360, 163640720, 259779643, 519559286, 1039118572, 1298898215, 2078237144, 2597796430, 4156474288, 5195592860, 10391185720, 20782371440]

約数ペア:

[(1, 20782371440), (2, 10391185720), (4, 5195592860), (5, 4156474288), (8, 2597796430), (10, 2078237144), (16, 1298898215), (20, 1039118572), (40, 519559286), (80, 259779643), (127, 163640720), (254, 81820360), (508, 40910180), (635, 32728144), (1016, 20455090), (1270, 16364072), (2032, 10227545), (2540, 8182036), (5080, 4091018), (10160, 2045509)]