28157080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{443}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 72887040

約数和(自身を除く): 44729960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 227, 280, 443, 454, 886, 908, 1135, 1589, 1772, 1816, 2215, 2270, 3101, 3178, 3544, 4430, 4540, 6202, 6356, 7945, 8860, 9080, 12404, 12712, 15505, 15890, 17720, 24808, 31010, 31780, 62020, 63560, 100561, 124040, 201122, 402244, 502805, 703927, 804488, 1005610, 1407854, 2011220, 2815708, 3519635, 4022440, 5631416, 7039270, 14078540, 28157080]

約数ペア:

[(1, 28157080), (2, 14078540), (4, 7039270), (5, 5631416), (7, 4022440), (8, 3519635), (10, 2815708), (14, 2011220), (20, 1407854), (28, 1005610), (35, 804488), (40, 703927), (56, 502805), (70, 402244), (140, 201122), (227, 124040), (280, 100561), (443, 63560), (454, 62020), (886, 31780), (908, 31010), (1135, 24808), (1589, 17720), (1772, 15890), (1816, 15505), (2215, 12712), (2270, 12404), (3101, 9080), (3178, 8860), (3544, 7945), (4430, 6356), (4540, 6202)]