20782280

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4091}}^1$

素因数の和:4229

約数の個数: 32

約数和(自身を含む): 47139840

約数和(自身を除く): 26357560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4091, 5080, 8182, 16364, 20455, 32728, 40910, 81820, 163640, 519557, 1039114, 2078228, 2597785, 4156456, 5195570, 10391140, 20782280]

約数ペア:

[(1, 20782280), (2, 10391140), (4, 5195570), (5, 4156456), (8, 2597785), (10, 2078228), (20, 1039114), (40, 519557), (127, 163640), (254, 81820), (508, 40910), (635, 32728), (1016, 20455), (1270, 16364), (2540, 8182), (4091, 5080)]