20138499

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 32947200

約数和(自身を除く): 12808701

約数列:

[1, 3, 9, 19, 29, 31, 57, 87, 93, 131, 171, 261, 279, 393, 551, 589, 899, 1179, 1653, 1767, 2489, 2697, 3799, 4061, 4959, 5301, 7467, 8091, 11397, 12183, 17081, 22401, 34191, 36549, 51243, 72181, 77159, 117769, 153729, 216543, 231477, 353307, 649629, 694431, 1059921, 2237611, 6712833, 20138499]

約数ペア:

[(1, 20138499), (3, 6712833), (9, 2237611), (19, 1059921), (29, 694431), (31, 649629), (57, 353307), (87, 231477), (93, 216543), (131, 153729), (171, 117769), (261, 77159), (279, 72181), (393, 51243), (551, 36549), (589, 34191), (899, 22401), (1179, 17081), (1653, 12183), (1767, 11397), (2489, 8091), (2697, 7467), (3799, 5301), (4061, 4959)]