20911163

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 27396096

約数和(自身を除く): 6484933

約数列:

[1, 7, 13, 23, 91, 97, 103, 161, 299, 679, 721, 1261, 1339, 2093, 2231, 2369, 8827, 9373, 9991, 15617, 16583, 29003, 30797, 69937, 129883, 203021, 215579, 229793, 909181, 1608551, 2987309, 20911163]

約数ペア:

[(1, 20911163), (7, 2987309), (13, 1608551), (23, 909181), (91, 229793), (97, 215579), (103, 203021), (161, 129883), (299, 69937), (679, 30797), (721, 29003), (1261, 16583), (1339, 15617), (2093, 9991), (2231, 9373), (2369, 8827)]