20404480

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{839}}^1$

素因数の和:879

約数の個数: 72

約数和(自身を含む): 51508800

約数和(自身を除く): 31104320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 839, 1216, 1280, 1520, 1678, 2432, 3040, 3356, 4195, 4864, 6080, 6712, 8390, 12160, 13424, 15941, 16780, 24320, 26848, 31882, 33560, 53696, 63764, 67120, 79705, 107392, 127528, 134240, 159410, 214784, 255056, 268480, 318820, 510112, 536960, 637640, 1020224, 1073920, 1275280, 2040448, 2550560, 4080896, 5101120, 10202240, 20404480]

約数ペア:

[(1, 20404480), (2, 10202240), (4, 5101120), (5, 4080896), (8, 2550560), (10, 2040448), (16, 1275280), (19, 1073920), (20, 1020224), (32, 637640), (38, 536960), (40, 510112), (64, 318820), (76, 268480), (80, 255056), (95, 214784), (128, 159410), (152, 134240), (160, 127528), (190, 107392), (256, 79705), (304, 67120), (320, 63764), (380, 53696), (608, 33560), (640, 31882), (760, 26848), (839, 24320), (1216, 16780), (1280, 15941), (1520, 13424), (1678, 12160), (2432, 8390), (3040, 6712), (3356, 6080), (4195, 4864)]