20591780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 48620544

約数和(自身を除く): 28028764

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 67, 110, 121, 127, 134, 220, 242, 254, 268, 335, 484, 508, 605, 635, 670, 737, 1210, 1270, 1340, 1397, 1474, 2420, 2540, 2794, 2948, 3685, 5588, 6985, 7370, 8107, 8509, 13970, 14740, 15367, 16214, 17018, 27940, 30734, 32428, 34036, 40535, 42545, 61468, 76835, 81070, 85090, 93599, 153670, 162140, 170180, 187198, 307340, 374396, 467995, 935990, 1029589, 1871980, 2059178, 4118356, 5147945, 10295890, 20591780]

約数ペア:

[(1, 20591780), (2, 10295890), (4, 5147945), (5, 4118356), (10, 2059178), (11, 1871980), (20, 1029589), (22, 935990), (44, 467995), (55, 374396), (67, 307340), (110, 187198), (121, 170180), (127, 162140), (134, 153670), (220, 93599), (242, 85090), (254, 81070), (268, 76835), (335, 61468), (484, 42545), (508, 40535), (605, 34036), (635, 32428), (670, 30734), (737, 27940), (1210, 17018), (1270, 16214), (1340, 15367), (1397, 14740), (1474, 13970), (2420, 8509), (2540, 8107), (2794, 7370), (2948, 6985), (3685, 5588)]