20778992

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{283}}^1\times {\mathrm{353}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 43632624

約数和(自身を除く): 22853632

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 283, 353, 566, 706, 1132, 1412, 2264, 2824, 3679, 4528, 4589, 5648, 7358, 9178, 14716, 18356, 29432, 36712, 58864, 73424, 99899, 199798, 399596, 799192, 1298687, 1598384, 2597374, 5194748, 10389496, 20778992]

約数ペア:

[(1, 20778992), (2, 10389496), (4, 5194748), (8, 2597374), (13, 1598384), (16, 1298687), (26, 799192), (52, 399596), (104, 199798), (208, 99899), (283, 73424), (353, 58864), (566, 36712), (706, 29432), (1132, 18356), (1412, 14716), (2264, 9178), (2824, 7358), (3679, 5648), (4528, 4589)]