20971515

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{683}}^1$

素因数の和:803

約数の個数: 32

約数和(自身を含む): 35458560

約数和(自身を除く): 14487045

約数列:

[1, 3, 5, 15, 23, 69, 89, 115, 267, 345, 445, 683, 1335, 2047, 2049, 3415, 6141, 10235, 10245, 15709, 30705, 47127, 60787, 78545, 182361, 235635, 303935, 911805, 1398101, 4194303, 6990505, 20971515]

約数ペア:

[(1, 20971515), (3, 6990505), (5, 4194303), (15, 1398101), (23, 911805), (69, 303935), (89, 235635), (115, 182361), (267, 78545), (345, 60787), (445, 47127), (683, 30705), (1335, 15709), (2047, 10245), (2049, 10235), (3415, 6141)]