128437640

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1\times {\mathrm{193}}^1$

素因数の和:462

約数の個数: 64

約数和(自身を含む): 295004160

約数和(自身を除く): 166566520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 131, 193, 254, 262, 386, 508, 524, 635, 655, 772, 965, 1016, 1048, 1270, 1310, 1544, 1930, 2540, 2620, 3860, 5080, 5240, 7720, 16637, 24511, 25283, 33274, 49022, 50566, 66548, 83185, 98044, 101132, 122555, 126415, 133096, 166370, 196088, 202264, 245110, 252830, 332740, 490220, 505660, 665480, 980440, 1011320, 3210941, 6421882, 12843764, 16054705, 25687528, 32109410, 64218820, 128437640]

約数ペア:

[(1, 128437640), (2, 64218820), (4, 32109410), (5, 25687528), (8, 16054705), (10, 12843764), (20, 6421882), (40, 3210941), (127, 1011320), (131, 980440), (193, 665480), (254, 505660), (262, 490220), (386, 332740), (508, 252830), (524, 245110), (635, 202264), (655, 196088), (772, 166370), (965, 133096), (1016, 126415), (1048, 122555), (1270, 101132), (1310, 98044), (1544, 83185), (1930, 66548), (2540, 50566), (2620, 49022), (3860, 33274), (5080, 25283), (5240, 24511), (7720, 16637)]