20782020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49481}}^1$

素因数の和:49500

約数の個数: 48

約数和(自身を含む): 66503808

約数和(自身を除く): 45721788

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49481, 98962, 148443, 197924, 247405, 296886, 346367, 494810, 593772, 692734, 742215, 989620, 1039101, 1385468, 1484430, 1731835, 2078202, 2968860, 3463670, 4156404, 5195505, 6927340, 10391010, 20782020]

約数ペア:

[(1, 20782020), (2, 10391010), (3, 6927340), (4, 5195505), (5, 4156404), (6, 3463670), (7, 2968860), (10, 2078202), (12, 1731835), (14, 1484430), (15, 1385468), (20, 1039101), (21, 989620), (28, 742215), (30, 692734), (35, 593772), (42, 494810), (60, 346367), (70, 296886), (84, 247405), (105, 197924), (140, 148443), (210, 98962), (420, 49481)]