66666555

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 119598336

約数和(自身を除く): 52931781

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 131, 215, 263, 387, 393, 645, 655, 789, 1179, 1315, 1935, 1965, 2367, 3945, 5633, 5895, 11309, 11835, 16899, 28165, 33927, 34453, 50697, 56545, 84495, 101781, 103359, 169635, 172265, 253485, 310077, 508905, 516795, 1481479, 1550385, 4444437, 7407395, 13333311, 22222185, 66666555]

約数ペア:

[(1, 66666555), (3, 22222185), (5, 13333311), (9, 7407395), (15, 4444437), (43, 1550385), (45, 1481479), (129, 516795), (131, 508905), (215, 310077), (263, 253485), (387, 172265), (393, 169635), (645, 103359), (655, 101781), (789, 84495), (1179, 56545), (1315, 50697), (1935, 34453), (1965, 33927), (2367, 28165), (3945, 16899), (5633, 11835), (5895, 11309)]