19801028

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{1973}}^1$

素因数の和:2183

約数の個数: 24

約数和(自身を含む): 37529688

約数和(自身を除く): 17728660

約数列:

[1, 2, 4, 13, 26, 52, 193, 386, 772, 1973, 2509, 3946, 5018, 7892, 10036, 25649, 51298, 102596, 380789, 761578, 1523156, 4950257, 9900514, 19801028]

約数ペア:

[(1, 19801028), (2, 9900514), (4, 4950257), (13, 1523156), (26, 761578), (52, 380789), (193, 102596), (386, 51298), (772, 25649), (1973, 10036), (2509, 7892), (3946, 5018)]