20807680

素因数分解:

$2^{15}\times 5^1\times {\mathrm{127}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 50330880

約数和(自身を除く): 29523200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 256, 320, 508, 512, 635, 640, 1016, 1024, 1270, 1280, 2032, 2048, 2540, 2560, 4064, 4096, 5080, 5120, 8128, 8192, 10160, 10240, 16256, 16384, 20320, 20480, 32512, 32768, 40640, 40960, 65024, 81280, 81920, 130048, 162560, 163840, 260096, 325120, 520192, 650240, 1040384, 1300480, 2080768, 2600960, 4161536, 5201920, 10403840, 20807680]

約数ペア:

[(1, 20807680), (2, 10403840), (4, 5201920), (5, 4161536), (8, 2600960), (10, 2080768), (16, 1300480), (20, 1040384), (32, 650240), (40, 520192), (64, 325120), (80, 260096), (127, 163840), (128, 162560), (160, 130048), (254, 81920), (256, 81280), (320, 65024), (508, 40960), (512, 40640), (635, 32768), (640, 32512), (1016, 20480), (1024, 20320), (1270, 16384), (1280, 16256), (2032, 10240), (2048, 10160), (2540, 8192), (2560, 8128), (4064, 5120), (4096, 5080)]