18705645

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1381}}^1$

素因数の和:1442

約数の個数: 48

約数和(自身を含む): 37944192

約数和(自身を除く): 19238547

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1381, 1505, 1935, 2709, 4143, 4515, 6905, 9667, 12429, 13545, 20715, 29001, 48335, 59383, 62145, 87003, 145005, 178149, 296915, 415681, 435015, 534447, 890745, 1247043, 2078405, 2672235, 3741129, 6235215, 18705645]

約数ペア:

[(1, 18705645), (3, 6235215), (5, 3741129), (7, 2672235), (9, 2078405), (15, 1247043), (21, 890745), (35, 534447), (43, 435015), (45, 415681), (63, 296915), (105, 178149), (129, 145005), (215, 87003), (301, 62145), (315, 59383), (387, 48335), (645, 29001), (903, 20715), (1381, 13545), (1505, 12429), (1935, 9667), (2709, 6905), (4143, 4515)]