20821904

素因数分解:

$2^4\times {\mathrm{127}}^1\times {\mathrm{10247}}^1$

素因数の和:10382

約数の個数: 20

約数和(自身を含む): 40664064

約数和(自身を除く): 19842160

約数列:

[1, 2, 4, 8, 16, 127, 254, 508, 1016, 2032, 10247, 20494, 40988, 81976, 163952, 1301369, 2602738, 5205476, 10410952, 20821904]

約数ペア:

[(1, 20821904), (2, 10410952), (4, 5205476), (8, 2602738), (16, 1301369), (127, 163952), (254, 81976), (508, 40988), (1016, 20494), (2032, 10247)]