20647260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{457}}^1$

素因数の和:723

約数の個数: 72

約数和(自身を含む): 63017136

約数和(自身を除く): 42369876

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 251, 457, 502, 753, 914, 1004, 1255, 1371, 1506, 1828, 2259, 2285, 2510, 2742, 3012, 3765, 4113, 4518, 4570, 5020, 5484, 6855, 7530, 8226, 9036, 9140, 11295, 13710, 15060, 16452, 20565, 22590, 27420, 41130, 45180, 82260, 114707, 229414, 344121, 458828, 573535, 688242, 1032363, 1147070, 1376484, 1720605, 2064726, 2294140, 3441210, 4129452, 5161815, 6882420, 10323630, 20647260]

約数ペア:

[(1, 20647260), (2, 10323630), (3, 6882420), (4, 5161815), (5, 4129452), (6, 3441210), (9, 2294140), (10, 2064726), (12, 1720605), (15, 1376484), (18, 1147070), (20, 1032363), (30, 688242), (36, 573535), (45, 458828), (60, 344121), (90, 229414), (180, 114707), (251, 82260), (457, 45180), (502, 41130), (753, 27420), (914, 22590), (1004, 20565), (1255, 16452), (1371, 15060), (1506, 13710), (1828, 11295), (2259, 9140), (2285, 9036), (2510, 8226), (2742, 7530), (3012, 6855), (3765, 5484), (4113, 5020), (4518, 4570)]