261567495

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:262

約数の個数: 128

約数和(自身を含む): 560609280

約数和(自身を除く): 299041785

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 41, 43, 45, 63, 105, 123, 129, 135, 157, 189, 205, 215, 287, 301, 315, 369, 387, 471, 615, 645, 785, 861, 903, 945, 1099, 1107, 1161, 1413, 1435, 1505, 1763, 1845, 1935, 2355, 2583, 2709, 3297, 4239, 4305, 4515, 5289, 5495, 5535, 5805, 6437, 6751, 7065, 7749, 8127, 8815, 9891, 12341, 12915, 13545, 15867, 16485, 19311, 20253, 21195, 26445, 29673, 32185, 33755, 37023, 38745, 40635, 45059, 47257, 47601, 49455, 57933, 60759, 61705, 79335, 96555, 101265, 111069, 135177, 141771, 148365, 173799, 182277, 185115, 225295, 236285, 238005, 276791, 289665, 303795, 333207, 405531, 425313, 555345, 675885, 708855, 830373, 868995, 911385, 1216593, 1275939, 1383955, 1666035, 1937537, 2027655, 2126565, 2491119, 4151865, 5812611, 6082965, 6379695, 7473357, 9687685, 12455595, 17437833, 29063055, 37366785, 52313499, 87189165, 261567495]

約数ペア:

[(1, 261567495), (3, 87189165), (5, 52313499), (7, 37366785), (9, 29063055), (15, 17437833), (21, 12455595), (27, 9687685), (35, 7473357), (41, 6379695), (43, 6082965), (45, 5812611), (63, 4151865), (105, 2491119), (123, 2126565), (129, 2027655), (135, 1937537), (157, 1666035), (189, 1383955), (205, 1275939), (215, 1216593), (287, 911385), (301, 868995), (315, 830373), (369, 708855), (387, 675885), (471, 555345), (615, 425313), (645, 405531), (785, 333207), (861, 303795), (903, 289665), (945, 276791), (1099, 238005), (1107, 236285), (1161, 225295), (1413, 185115), (1435, 182277), (1505, 173799), (1763, 148365), (1845, 141771), (1935, 135177), (2355, 111069), (2583, 101265), (2709, 96555), (3297, 79335), (4239, 61705), (4305, 60759), (4515, 57933), (5289, 49455), (5495, 47601), (5535, 47257), (5805, 45059), (6437, 40635), (6751, 38745), (7065, 37023), (7749, 33755), (8127, 32185), (8815, 29673), (9891, 26445), (12341, 21195), (12915, 20253), (13545, 19311), (15867, 16485)]