261189495

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:302

約数の個数: 128

約数和(自身を含む): 565678080

約数和(自身を除く): 304488585

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 27, 35, 45, 61, 63, 69, 105, 115, 135, 161, 183, 189, 197, 207, 305, 315, 345, 427, 483, 549, 591, 621, 805, 915, 945, 985, 1035, 1281, 1379, 1403, 1449, 1647, 1773, 2135, 2415, 2745, 2955, 3105, 3843, 4137, 4209, 4347, 4531, 5319, 6405, 6895, 7015, 7245, 8235, 8865, 9821, 11529, 12017, 12411, 12627, 13593, 19215, 20685, 21045, 21735, 22655, 26595, 29463, 31717, 36051, 37233, 37881, 40779, 49105, 57645, 60085, 62055, 63135, 67965, 84119, 88389, 95151, 108153, 122337, 147315, 158585, 180255, 186165, 189405, 203895, 252357, 265167, 276391, 285453, 324459, 420595, 441945, 475755, 540765, 611685, 757071, 829173, 856359, 1261785, 1325835, 1381955, 1427265, 1622295, 1934737, 2271213, 2487519, 3785355, 4145865, 4281795, 5804211, 7462557, 9673685, 11356065, 12437595, 17412633, 29021055, 37312785, 52237899, 87063165, 261189495]

約数ペア:

[(1, 261189495), (3, 87063165), (5, 52237899), (7, 37312785), (9, 29021055), (15, 17412633), (21, 12437595), (23, 11356065), (27, 9673685), (35, 7462557), (45, 5804211), (61, 4281795), (63, 4145865), (69, 3785355), (105, 2487519), (115, 2271213), (135, 1934737), (161, 1622295), (183, 1427265), (189, 1381955), (197, 1325835), (207, 1261785), (305, 856359), (315, 829173), (345, 757071), (427, 611685), (483, 540765), (549, 475755), (591, 441945), (621, 420595), (805, 324459), (915, 285453), (945, 276391), (985, 265167), (1035, 252357), (1281, 203895), (1379, 189405), (1403, 186165), (1449, 180255), (1647, 158585), (1773, 147315), (2135, 122337), (2415, 108153), (2745, 95151), (2955, 88389), (3105, 84119), (3843, 67965), (4137, 63135), (4209, 62055), (4347, 60085), (4531, 57645), (5319, 49105), (6405, 40779), (6895, 37881), (7015, 37233), (7245, 36051), (8235, 31717), (8865, 29463), (9821, 26595), (11529, 22655), (12017, 21735), (12411, 21045), (12627, 20685), (13593, 19215)]