20646521

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 26438400

約数和(自身を除く): 5791879

約数列:

[1, 7, 19, 29, 53, 101, 133, 203, 371, 551, 707, 1007, 1537, 1919, 2929, 3857, 5353, 7049, 10759, 13433, 20503, 29203, 37471, 55651, 101707, 155237, 204421, 389557, 711949, 1086659, 2949503, 20646521]

約数ペア:

[(1, 20646521), (7, 2949503), (19, 1086659), (29, 711949), (53, 389557), (101, 204421), (133, 155237), (203, 101707), (371, 55651), (551, 37471), (707, 29203), (1007, 20503), (1537, 13433), (1919, 10759), (2929, 7049), (3857, 5353)]