20857564221

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{1223}}^1\times {\mathrm{437293}}^1$

素因数の和:438532

約数の個数: 16

約数和(自身を含む): 29973879936

約数和(自身を除く): 9116315715

約数列:

[1, 3, 13, 39, 1223, 3669, 15899, 47697, 437293, 1311879, 5684809, 17054427, 534809339, 1604428017, 6952521407, 20857564221]

約数ペア:

[(1, 20857564221), (3, 6952521407), (13, 1604428017), (39, 534809339), (1223, 17054427), (3669, 5684809), (15899, 1311879), (47697, 437293)]