21120016

素因数分解:

$2^4\times {\mathrm{191}}^1\times {\mathrm{6911}}^1$

素因数の和:7110

約数の個数: 20

約数和(自身を含む): 41140224

約数和(自身を除く): 20020208

約数列:

[1, 2, 4, 8, 16, 191, 382, 764, 1528, 3056, 6911, 13822, 27644, 55288, 110576, 1320001, 2640002, 5280004, 10560008, 21120016]

約数ペア:

[(1, 21120016), (2, 10560008), (4, 5280004), (8, 2640002), (16, 1320001), (191, 110576), (382, 55288), (764, 27644), (1528, 13822), (3056, 6911)]