21271239

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 14671161

約数列:

[1, 3, 9, 11, 29, 31, 33, 87, 93, 99, 239, 261, 279, 319, 341, 717, 899, 957, 1023, 2151, 2629, 2697, 2871, 3069, 6931, 7409, 7887, 8091, 9889, 20793, 22227, 23661, 29667, 62379, 66681, 76241, 81499, 89001, 214861, 228723, 244497, 644583, 686169, 733491, 1933749, 2363471, 7090413, 21271239]

約数ペア:

[(1, 21271239), (3, 7090413), (9, 2363471), (11, 1933749), (29, 733491), (31, 686169), (33, 644583), (87, 244497), (93, 228723), (99, 214861), (239, 89001), (261, 81499), (279, 76241), (319, 66681), (341, 62379), (717, 29667), (899, 23661), (957, 22227), (1023, 20793), (2151, 9889), (2629, 8091), (2697, 7887), (2871, 7409), (3069, 6931)]