28281320

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 66361680

約数和(自身を除く): 38080360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 97, 148, 185, 194, 197, 296, 370, 388, 394, 485, 740, 776, 788, 970, 985, 1480, 1576, 1940, 1970, 3589, 3880, 3940, 7178, 7289, 7880, 14356, 14578, 17945, 19109, 28712, 29156, 35890, 36445, 38218, 58312, 71780, 72890, 76436, 95545, 143560, 145780, 152872, 191090, 291560, 382180, 707033, 764360, 1414066, 2828132, 3535165, 5656264, 7070330, 14140660, 28281320]

約数ペア:

[(1, 28281320), (2, 14140660), (4, 7070330), (5, 5656264), (8, 3535165), (10, 2828132), (20, 1414066), (37, 764360), (40, 707033), (74, 382180), (97, 291560), (148, 191090), (185, 152872), (194, 145780), (197, 143560), (296, 95545), (370, 76436), (388, 72890), (394, 71780), (485, 58312), (740, 38218), (776, 36445), (788, 35890), (970, 29156), (985, 28712), (1480, 19109), (1576, 17945), (1940, 14578), (1970, 14356), (3589, 7880), (3880, 7289), (3940, 7178)]