20455491

素因数分解:

$3^1\times 7^3\times {\mathrm{103}}^1\times {\mathrm{193}}^1$

素因数の和:320

約数の個数: 32

約数和(自身を含む): 32281600

約数和(自身を除く): 11826109

約数列:

[1, 3, 7, 21, 49, 103, 147, 193, 309, 343, 579, 721, 1029, 1351, 2163, 4053, 5047, 9457, 15141, 19879, 28371, 35329, 59637, 66199, 105987, 139153, 198597, 417459, 974071, 2922213, 6818497, 20455491]

約数ペア:

[(1, 20455491), (3, 6818497), (7, 2922213), (21, 974071), (49, 417459), (103, 198597), (147, 139153), (193, 105987), (309, 66199), (343, 59637), (579, 35329), (721, 28371), (1029, 19879), (1351, 15141), (2163, 9457), (4053, 5047)]