17981440

素因数分解:

$2^{13}\times 5^1\times {\mathrm{439}}^1$

素因数の和:470

約数の個数: 56

約数和(自身を含む): 43251120

約数和(自身を除く): 25269680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 439, 512, 640, 878, 1024, 1280, 1756, 2048, 2195, 2560, 3512, 4096, 4390, 5120, 7024, 8192, 8780, 10240, 14048, 17560, 20480, 28096, 35120, 40960, 56192, 70240, 112384, 140480, 224768, 280960, 449536, 561920, 899072, 1123840, 1798144, 2247680, 3596288, 4495360, 8990720, 17981440]

約数ペア:

[(1, 17981440), (2, 8990720), (4, 4495360), (5, 3596288), (8, 2247680), (10, 1798144), (16, 1123840), (20, 899072), (32, 561920), (40, 449536), (64, 280960), (80, 224768), (128, 140480), (160, 112384), (256, 70240), (320, 56192), (439, 40960), (512, 35120), (640, 28096), (878, 20480), (1024, 17560), (1280, 14048), (1756, 10240), (2048, 8780), (2195, 8192), (2560, 7024), (3512, 5120), (4096, 4390)]