18020223

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 29877120

約数和(自身を除く): 11856897

約数列:

[1, 3, 9, 13, 29, 39, 47, 87, 113, 117, 141, 261, 339, 377, 423, 611, 1017, 1131, 1363, 1469, 1833, 3277, 3393, 4089, 4407, 5311, 5499, 9831, 12267, 13221, 15933, 17719, 29493, 42601, 47799, 53157, 69043, 127803, 154019, 159471, 207129, 383409, 462057, 621387, 1386171, 2002247, 6006741, 18020223]

約数ペア:

[(1, 18020223), (3, 6006741), (9, 2002247), (13, 1386171), (29, 621387), (39, 462057), (47, 383409), (87, 207129), (113, 159471), (117, 154019), (141, 127803), (261, 69043), (339, 53157), (377, 47799), (423, 42601), (611, 29493), (1017, 17719), (1131, 15933), (1363, 13221), (1469, 12267), (1833, 9831), (3277, 5499), (3393, 5311), (4089, 4407)]