28009828

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{431}}^1$

素因数の和:664

約数の個数: 48

約数和(自身を含む): 61544448

約数和(自身を除く): 33534620

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 211, 308, 422, 431, 844, 862, 1477, 1724, 2321, 2954, 3017, 4642, 4741, 5908, 6034, 9284, 9482, 12068, 16247, 18964, 32494, 33187, 64988, 66374, 90941, 132748, 181882, 363764, 636587, 1000351, 1273174, 2000702, 2546348, 4001404, 7002457, 14004914, 28009828]

約数ペア:

[(1, 28009828), (2, 14004914), (4, 7002457), (7, 4001404), (11, 2546348), (14, 2000702), (22, 1273174), (28, 1000351), (44, 636587), (77, 363764), (154, 181882), (211, 132748), (308, 90941), (422, 66374), (431, 64988), (844, 33187), (862, 32494), (1477, 18964), (1724, 16247), (2321, 12068), (2954, 9482), (3017, 9284), (4642, 6034), (4741, 5908)]