19903688

素因数分解:

$2^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2557}}^1$

素因数の和:2709

約数の個数: 32

約数和(自身を含む): 42974400

約数和(自身を除く): 23070712

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 139, 278, 556, 973, 1112, 1946, 2557, 3892, 5114, 7784, 10228, 17899, 20456, 35798, 71596, 143192, 355423, 710846, 1421692, 2487961, 2843384, 4975922, 9951844, 19903688]

約数ペア:

[(1, 19903688), (2, 9951844), (4, 4975922), (7, 2843384), (8, 2487961), (14, 1421692), (28, 710846), (56, 355423), (139, 143192), (278, 71596), (556, 35798), (973, 20456), (1112, 17899), (1946, 10228), (2557, 7784), (3892, 5114)]