18693519

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 28030464

約数和(自身を除く): 9336945

約数列:

[1, 3, 13, 39, 43, 71, 129, 157, 213, 471, 559, 923, 1677, 2041, 2769, 3053, 6123, 6751, 9159, 11147, 20253, 33441, 39689, 87763, 119067, 144911, 263289, 434733, 479321, 1437963, 6231173, 18693519]

約数ペア:

[(1, 18693519), (3, 6231173), (13, 1437963), (39, 479321), (43, 434733), (71, 263289), (129, 144911), (157, 119067), (213, 87763), (471, 39689), (559, 33441), (923, 20253), (1677, 11147), (2041, 9159), (2769, 6751), (3053, 6123)]