21052143

素因数分解:

$3^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{347}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 36381312

約数和(自身を除く): 15329169

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 107, 189, 321, 347, 567, 749, 963, 1041, 2247, 2429, 2889, 3123, 6741, 7287, 8667, 9369, 20223, 21861, 28107, 37129, 60669, 65583, 111387, 196749, 259903, 334161, 779709, 1002483, 2339127, 3007449, 7017381, 21052143]

約数ペア:

[(1, 21052143), (3, 7017381), (7, 3007449), (9, 2339127), (21, 1002483), (27, 779709), (63, 334161), (81, 259903), (107, 196749), (189, 111387), (321, 65583), (347, 60669), (567, 37129), (749, 28107), (963, 21861), (1041, 20223), (2247, 9369), (2429, 8667), (2889, 7287), (3123, 6741)]