247996987

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 318880800

約数和(自身を除く): 70883813

約数列:

[1, 7, 19, 41, 49, 73, 89, 133, 287, 511, 623, 779, 931, 1387, 1691, 2009, 2993, 3577, 3649, 4361, 5453, 6497, 9709, 11837, 20951, 25543, 38171, 45479, 56867, 67963, 69331, 82859, 123443, 146657, 178801, 266377, 318353, 398069, 485317, 864101, 1864639, 2786483, 3397219, 5061163, 6048707, 13052473, 35428141, 247996987]

約数ペア:

[(1, 247996987), (7, 35428141), (19, 13052473), (41, 6048707), (49, 5061163), (73, 3397219), (89, 2786483), (133, 1864639), (287, 864101), (511, 485317), (623, 398069), (779, 318353), (931, 266377), (1387, 178801), (1691, 146657), (2009, 123443), (2993, 82859), (3577, 69331), (3649, 67963), (4361, 56867), (5453, 45479), (6497, 38171), (9709, 25543), (11837, 20951)]