20513817

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 33022080

約数和(自身を除く): 12508263

約数列:

[1, 3, 9, 27, 29, 41, 71, 81, 87, 123, 213, 243, 261, 369, 639, 783, 1107, 1189, 1917, 2059, 2349, 2911, 3321, 3567, 5751, 6177, 7047, 8733, 9963, 10701, 17253, 18531, 26199, 32103, 55593, 78597, 84419, 96309, 166779, 235791, 253257, 288927, 500337, 707373, 759771, 2279313, 6837939, 20513817]

約数ペア:

[(1, 20513817), (3, 6837939), (9, 2279313), (27, 759771), (29, 707373), (41, 500337), (71, 288927), (81, 253257), (87, 235791), (123, 166779), (213, 96309), (243, 84419), (261, 78597), (369, 55593), (639, 32103), (783, 26199), (1107, 18531), (1189, 17253), (1917, 10701), (2059, 9963), (2349, 8733), (2911, 7047), (3321, 6177), (3567, 5751)]