81978160

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4903}}^1$

素因数の和:4946

約数の個数: 80

約数和(自身を含む): 218914560

約数和(自身を除く): 136936400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1520, 1672, 2090, 3344, 4180, 4903, 8360, 9806, 16720, 19612, 24515, 39224, 49030, 53933, 78448, 93157, 98060, 107866, 186314, 196120, 215732, 269665, 372628, 392240, 431464, 465785, 539330, 745256, 862928, 931570, 1024727, 1078660, 1490512, 1863140, 2049454, 2157320, 3726280, 4098908, 4314640, 5123635, 7452560, 8197816, 10247270, 16395632, 20494540, 40989080, 81978160]

約数ペア:

[(1, 81978160), (2, 40989080), (4, 20494540), (5, 16395632), (8, 10247270), (10, 8197816), (11, 7452560), (16, 5123635), (19, 4314640), (20, 4098908), (22, 3726280), (38, 2157320), (40, 2049454), (44, 1863140), (55, 1490512), (76, 1078660), (80, 1024727), (88, 931570), (95, 862928), (110, 745256), (152, 539330), (176, 465785), (190, 431464), (209, 392240), (220, 372628), (304, 269665), (380, 215732), (418, 196120), (440, 186314), (760, 107866), (836, 98060), (880, 93157), (1045, 78448), (1520, 53933), (1672, 49030), (2090, 39224), (3344, 24515), (4180, 19612), (4903, 16720), (8360, 9806)]