81671655

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 151538688

約数和(自身を除く): 69867033

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 71, 85, 195, 213, 221, 255, 347, 355, 663, 923, 1041, 1065, 1105, 1207, 1735, 2769, 3315, 3621, 4511, 4615, 5205, 5899, 6035, 13533, 13845, 15691, 17697, 18105, 22555, 24637, 29495, 47073, 67665, 73911, 76687, 78455, 88485, 123185, 230061, 235365, 320281, 369555, 383435, 418829, 960843, 1150305, 1256487, 1601405, 2094145, 4804215, 5444777, 6282435, 16334331, 27223885, 81671655]

約数ペア:

[(1, 81671655), (3, 27223885), (5, 16334331), (13, 6282435), (15, 5444777), (17, 4804215), (39, 2094145), (51, 1601405), (65, 1256487), (71, 1150305), (85, 960843), (195, 418829), (213, 383435), (221, 369555), (255, 320281), (347, 235365), (355, 230061), (663, 123185), (923, 88485), (1041, 78455), (1065, 76687), (1105, 73911), (1207, 67665), (1735, 47073), (2769, 29495), (3315, 24637), (3621, 22555), (4511, 18105), (4615, 17697), (5205, 15691), (5899, 13845), (6035, 13533)]