20771840

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4057}}^1$

素因数の和:4082

約数の個数: 44

約数和(自身を含む): 49840356

約数和(自身を除く): 29068516

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4057, 5120, 8114, 16228, 20285, 32456, 40570, 64912, 81140, 129824, 162280, 259648, 324560, 519296, 649120, 1038592, 1298240, 2077184, 2596480, 4154368, 5192960, 10385920, 20771840]

約数ペア:

[(1, 20771840), (2, 10385920), (4, 5192960), (5, 4154368), (8, 2596480), (10, 2077184), (16, 1298240), (20, 1038592), (32, 649120), (40, 519296), (64, 324560), (80, 259648), (128, 162280), (160, 129824), (256, 81140), (320, 64912), (512, 40570), (640, 32456), (1024, 20285), (1280, 16228), (2560, 8114), (4057, 5120)]