20688477

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 9503139

約数列:

[1, 3, 23, 41, 69, 71, 103, 123, 213, 309, 943, 1633, 2369, 2829, 2911, 4223, 4899, 7107, 7313, 8733, 12669, 21939, 66953, 97129, 168199, 200859, 291387, 299833, 504597, 899499, 6896159, 20688477]

約数ペア:

[(1, 20688477), (3, 6896159), (23, 899499), (41, 504597), (69, 299833), (71, 291387), (103, 200859), (123, 168199), (213, 97129), (309, 66953), (943, 21939), (1633, 12669), (2369, 8733), (2829, 7313), (2911, 7107), (4223, 4899)]