81530680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:389

約数の個数: 128

約数和(自身を含む): 231828480

約数和(自身を除く): 150297800

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 103, 110, 140, 154, 206, 220, 257, 280, 308, 385, 412, 440, 514, 515, 616, 721, 770, 824, 1028, 1030, 1133, 1285, 1442, 1540, 1799, 2056, 2060, 2266, 2570, 2827, 2884, 3080, 3598, 3605, 4120, 4532, 5140, 5654, 5665, 5768, 7196, 7210, 7931, 8995, 9064, 10280, 11308, 11330, 14135, 14392, 14420, 15862, 17990, 19789, 22616, 22660, 26471, 28270, 28840, 31724, 35980, 39578, 39655, 45320, 52942, 56540, 63448, 71960, 79156, 79310, 98945, 105884, 113080, 132355, 158312, 158620, 185297, 197890, 211768, 264710, 291181, 317240, 370594, 395780, 529420, 582362, 741188, 791560, 926485, 1058840, 1164724, 1455905, 1482376, 1852970, 2038267, 2329448, 2911810, 3705940, 4076534, 5823620, 7411880, 8153068, 10191335, 11647240, 16306136, 20382670, 40765340, 81530680]

約数ペア:

[(1, 81530680), (2, 40765340), (4, 20382670), (5, 16306136), (7, 11647240), (8, 10191335), (10, 8153068), (11, 7411880), (14, 5823620), (20, 4076534), (22, 3705940), (28, 2911810), (35, 2329448), (40, 2038267), (44, 1852970), (55, 1482376), (56, 1455905), (70, 1164724), (77, 1058840), (88, 926485), (103, 791560), (110, 741188), (140, 582362), (154, 529420), (206, 395780), (220, 370594), (257, 317240), (280, 291181), (308, 264710), (385, 211768), (412, 197890), (440, 185297), (514, 158620), (515, 158312), (616, 132355), (721, 113080), (770, 105884), (824, 98945), (1028, 79310), (1030, 79156), (1133, 71960), (1285, 63448), (1442, 56540), (1540, 52942), (1799, 45320), (2056, 39655), (2060, 39578), (2266, 35980), (2570, 31724), (2827, 28840), (2884, 28270), (3080, 26471), (3598, 22660), (3605, 22616), (4120, 19789), (4532, 17990), (5140, 15862), (5654, 14420), (5665, 14392), (5768, 14135), (7196, 11330), (7210, 11308), (7931, 10280), (8995, 9064)]