20788521

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{131}}^1\times {\mathrm{313}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 30339936

約数和(自身を除く): 9551415

約数列:

[1, 3, 13, 39, 131, 169, 313, 393, 507, 939, 1703, 4069, 5109, 12207, 22139, 41003, 52897, 66417, 123009, 158691, 533039, 1599117, 6929507, 20788521]

約数ペア:

[(1, 20788521), (3, 6929507), (13, 1599117), (39, 533039), (131, 158691), (169, 123009), (313, 66417), (393, 52897), (507, 41003), (939, 22139), (1703, 12207), (4069, 5109)]