20781776

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8273}}^1$

素因数の和:8438

約数の個数: 20

約数和(自身を含む): 40526052

約数和(自身を除く): 19744276

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8273, 16546, 33092, 66184, 132368, 1298861, 2597722, 5195444, 10390888, 20781776]

約数ペア:

[(1, 20781776), (2, 10390888), (4, 5195444), (8, 2597722), (16, 1298861), (157, 132368), (314, 66184), (628, 33092), (1256, 16546), (2512, 8273)]