261681945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{193}}^1\times {\mathrm{349}}^1$

素因数の和:594

約数の個数: 64

約数和(自身を含む): 495398400

約数和(自身を除く): 233716455

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 193, 259, 349, 555, 579, 777, 965, 1047, 1295, 1351, 1745, 2443, 2895, 3885, 4053, 5235, 6755, 7141, 7329, 12215, 12913, 20265, 21423, 35705, 36645, 38739, 49987, 64565, 67357, 90391, 107115, 149961, 193695, 202071, 249935, 271173, 336785, 451955, 471499, 749805, 1010355, 1355865, 1414497, 2357495, 2492209, 7072485, 7476627, 12461045, 17445463, 37383135, 52336389, 87227315, 261681945]

約数ペア:

[(1, 261681945), (3, 87227315), (5, 52336389), (7, 37383135), (15, 17445463), (21, 12461045), (35, 7476627), (37, 7072485), (105, 2492209), (111, 2357495), (185, 1414497), (193, 1355865), (259, 1010355), (349, 749805), (555, 471499), (579, 451955), (777, 336785), (965, 271173), (1047, 249935), (1295, 202071), (1351, 193695), (1745, 149961), (2443, 107115), (2895, 90391), (3885, 67357), (4053, 64565), (5235, 49987), (6755, 38739), (7141, 36645), (7329, 35705), (12215, 21423), (12913, 20265)]