28013000

素因数分解:

$2^3\times 5^3\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 66409200

約数和(自身を除く): 38396200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 125, 200, 218, 250, 257, 436, 500, 514, 545, 872, 1000, 1028, 1090, 1285, 2056, 2180, 2570, 2725, 4360, 5140, 5450, 6425, 10280, 10900, 12850, 13625, 21800, 25700, 27250, 28013, 32125, 51400, 54500, 56026, 64250, 109000, 112052, 128500, 140065, 224104, 257000, 280130, 560260, 700325, 1120520, 1400650, 2801300, 3501625, 5602600, 7003250, 14006500, 28013000]

約数ペア:

[(1, 28013000), (2, 14006500), (4, 7003250), (5, 5602600), (8, 3501625), (10, 2801300), (20, 1400650), (25, 1120520), (40, 700325), (50, 560260), (100, 280130), (109, 257000), (125, 224104), (200, 140065), (218, 128500), (250, 112052), (257, 109000), (436, 64250), (500, 56026), (514, 54500), (545, 51400), (872, 32125), (1000, 28013), (1028, 27250), (1090, 25700), (1285, 21800), (2056, 13625), (2180, 12850), (2570, 10900), (2725, 10280), (4360, 6425), (5140, 5450)]