18039987

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2153}}^1$

素因数の和:2192

約数の個数: 36

約数和(自身を含む): 31922280

約数和(自身を除く): 13882293

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2153, 2793, 6459, 8379, 15071, 19377, 40907, 45213, 105497, 122721, 135639, 286349, 316491, 368163, 859047, 949473, 2004443, 2577141, 6013329, 18039987]

約数ペア:

[(1, 18039987), (3, 6013329), (7, 2577141), (9, 2004443), (19, 949473), (21, 859047), (49, 368163), (57, 316491), (63, 286349), (133, 135639), (147, 122721), (171, 105497), (399, 45213), (441, 40907), (931, 19377), (1197, 15071), (2153, 8379), (2793, 6459)]