20805886

素因数分解:

$2^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1\times {\mathrm{653}}^1$

素因数の和:923

約数の個数: 16

約数和(自身を含む): 31784400

約数和(自身を除く): 10978514

約数列:

[1, 2, 89, 178, 179, 358, 653, 1306, 15931, 31862, 58117, 116234, 116887, 233774, 10402943, 20805886]

約数ペア:

[(1, 20805886), (2, 10402943), (89, 233774), (178, 116887), (179, 116234), (358, 58117), (653, 31862), (1306, 15931)]