20686276

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:532

約数の個数: 36

約数和(自身を含む): 39844224

約数和(自身を除く): 19157948

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 169, 284, 338, 431, 676, 862, 923, 1724, 1846, 3692, 5603, 11206, 11999, 22412, 23998, 30601, 47996, 61202, 72839, 122404, 145678, 291356, 397813, 795626, 1591252, 5171569, 10343138, 20686276]

約数ペア:

[(1, 20686276), (2, 10343138), (4, 5171569), (13, 1591252), (26, 795626), (52, 397813), (71, 291356), (142, 145678), (169, 122404), (284, 72839), (338, 61202), (431, 47996), (676, 30601), (862, 23998), (923, 22412), (1724, 11999), (1846, 11206), (3692, 5603)]