20650400

素因数分解:

$2^5\times 5^2\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:414

約数の個数: 72

約数和(自身を含む): 51184224

約数和(自身を除く): 30533824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 83, 100, 160, 166, 200, 311, 332, 400, 415, 622, 664, 800, 830, 1244, 1328, 1555, 1660, 2075, 2488, 2656, 3110, 3320, 4150, 4976, 6220, 6640, 7775, 8300, 9952, 12440, 13280, 15550, 16600, 24880, 25813, 31100, 33200, 49760, 51626, 62200, 66400, 103252, 124400, 129065, 206504, 248800, 258130, 413008, 516260, 645325, 826016, 1032520, 1290650, 2065040, 2581300, 4130080, 5162600, 10325200, 20650400]

約数ペア:

[(1, 20650400), (2, 10325200), (4, 5162600), (5, 4130080), (8, 2581300), (10, 2065040), (16, 1290650), (20, 1032520), (25, 826016), (32, 645325), (40, 516260), (50, 413008), (80, 258130), (83, 248800), (100, 206504), (160, 129065), (166, 124400), (200, 103252), (311, 66400), (332, 62200), (400, 51626), (415, 49760), (622, 33200), (664, 31100), (800, 25813), (830, 24880), (1244, 16600), (1328, 15550), (1555, 13280), (1660, 12440), (2075, 9952), (2488, 8300), (2656, 7775), (3110, 6640), (3320, 6220), (4150, 4976)]