18670407

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{641}}^1$

素因数の和:743

約数の個数: 32

約数和(自身を含む): 30405120

約数和(自身を除く): 11734713

約数列:

[1, 3, 7, 19, 21, 57, 73, 133, 219, 399, 511, 641, 1387, 1533, 1923, 4161, 4487, 9709, 12179, 13461, 29127, 36537, 46793, 85253, 140379, 255759, 327551, 889067, 982653, 2667201, 6223469, 18670407]

約数ペア:

[(1, 18670407), (3, 6223469), (7, 2667201), (19, 982653), (21, 889067), (57, 327551), (73, 255759), (133, 140379), (219, 85253), (399, 46793), (511, 36537), (641, 29127), (1387, 13461), (1533, 12179), (1923, 9709), (4161, 4487)]