20404016

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{631}}^1$

素因数の和:729

約数の個数: 40

約数和(自身を含む): 41378304

約数和(自身を除く): 20974288

約数列:

[1, 2, 4, 8, 16, 43, 47, 86, 94, 172, 188, 344, 376, 631, 688, 752, 1262, 2021, 2524, 4042, 5048, 8084, 10096, 16168, 27133, 29657, 32336, 54266, 59314, 108532, 118628, 217064, 237256, 434128, 474512, 1275251, 2550502, 5101004, 10202008, 20404016]

約数ペア:

[(1, 20404016), (2, 10202008), (4, 5101004), (8, 2550502), (16, 1275251), (43, 474512), (47, 434128), (86, 237256), (94, 217064), (172, 118628), (188, 108532), (344, 59314), (376, 54266), (631, 32336), (688, 29657), (752, 27133), (1262, 16168), (2021, 10096), (2524, 8084), (4042, 5048)]