21271251

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 31030272

約数和(自身を除く): 9759021

約数列:

[1, 3, 23, 41, 69, 73, 103, 123, 219, 309, 943, 1679, 2369, 2829, 2993, 4223, 5037, 7107, 7519, 8979, 12669, 22557, 68839, 97129, 172937, 206517, 291387, 308279, 518811, 924837, 7090417, 21271251]

約数ペア:

[(1, 21271251), (3, 7090417), (23, 924837), (41, 518811), (69, 308279), (73, 291387), (103, 206517), (123, 172937), (219, 97129), (309, 68839), (943, 22557), (1679, 12669), (2369, 8979), (2829, 7519), (2993, 7107), (4223, 5037)]