20864560

素因数分解:

$2^4\times 5^1\times {\mathrm{260807}}^1$

素因数の和:260820

約数の個数: 20

約数和(自身を含む): 48510288

約数和(自身を除く): 27645728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260807, 521614, 1043228, 1304035, 2086456, 2608070, 4172912, 5216140, 10432280, 20864560]

約数ペア:

[(1, 20864560), (2, 10432280), (4, 5216140), (5, 4172912), (8, 2608070), (10, 2086456), (16, 1304035), (20, 1043228), (40, 521614), (80, 260807)]