20647060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1061}}^1$

素因数の和:1216

約数の個数: 48

約数和(自身を含む): 49956480

約数和(自身を除く): 29309420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1061, 1390, 1946, 2122, 2780, 3892, 4244, 4865, 5305, 7427, 9730, 10610, 14854, 19460, 21220, 29708, 37135, 74270, 147479, 148540, 294958, 589916, 737395, 1032353, 1474790, 2064706, 2949580, 4129412, 5161765, 10323530, 20647060]

約数ペア:

[(1, 20647060), (2, 10323530), (4, 5161765), (5, 4129412), (7, 2949580), (10, 2064706), (14, 1474790), (20, 1032353), (28, 737395), (35, 589916), (70, 294958), (139, 148540), (140, 147479), (278, 74270), (556, 37135), (695, 29708), (973, 21220), (1061, 19460), (1390, 14854), (1946, 10610), (2122, 9730), (2780, 7427), (3892, 5305), (4244, 4865)]