20420878

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{4639}}^1$

素因数の和:4743

約数の個数: 16

約数和(自身を含む): 32071680

約数和(自身を除く): 11650802

約数列:

[1, 2, 31, 62, 71, 142, 2201, 4402, 4639, 9278, 143809, 287618, 329369, 658738, 10210439, 20420878]

約数ペア:

[(1, 20420878), (2, 10210439), (31, 658738), (62, 329369), (71, 287618), (142, 143809), (2201, 9278), (4402, 4639)]