20298213

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:458

約数の個数: 48

約数和(自身を含む): 34769280

約数和(自身を除く): 14471067

約数列:

[1, 3, 9, 13, 19, 23, 39, 57, 69, 117, 171, 207, 247, 299, 397, 437, 741, 897, 1191, 1311, 2223, 2691, 3573, 3933, 5161, 5681, 7543, 9131, 15483, 17043, 22629, 27393, 46449, 51129, 67887, 82179, 98059, 118703, 173489, 294177, 356109, 520467, 882531, 1068327, 1561401, 2255357, 6766071, 20298213]

約数ペア:

[(1, 20298213), (3, 6766071), (9, 2255357), (13, 1561401), (19, 1068327), (23, 882531), (39, 520467), (57, 356109), (69, 294177), (117, 173489), (171, 118703), (207, 98059), (247, 82179), (299, 67887), (397, 51129), (437, 46449), (741, 27393), (897, 22629), (1191, 17043), (1311, 15483), (2223, 9131), (2691, 7543), (3573, 5681), (3933, 5161)]