20647581

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 9212259

約数列:

[1, 3, 31, 53, 59, 71, 93, 159, 177, 213, 1643, 1829, 2201, 3127, 3763, 4189, 4929, 5487, 6603, 9381, 11289, 12567, 96937, 116653, 129859, 222017, 290811, 349959, 389577, 666051, 6882527, 20647581]

約数ペア:

[(1, 20647581), (3, 6882527), (31, 666051), (53, 389577), (59, 349959), (71, 290811), (93, 222017), (159, 129859), (177, 116653), (213, 96937), (1643, 12567), (1829, 11289), (2201, 9381), (3127, 6603), (3763, 5487), (4189, 4929)]