20682220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{211}}^1$

素因数の和:275

約数の個数: 72

約数和(自身を含む): 48882960

約数和(自身を除く): 28200740

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 169, 211, 260, 290, 338, 377, 422, 580, 676, 754, 844, 845, 1055, 1508, 1690, 1885, 2110, 2743, 3380, 3770, 4220, 4901, 5486, 6119, 7540, 9802, 10972, 12238, 13715, 19604, 24476, 24505, 27430, 30595, 35659, 49010, 54860, 61190, 71318, 79547, 98020, 122380, 142636, 159094, 178295, 318188, 356590, 397735, 713180, 795470, 1034111, 1590940, 2068222, 4136444, 5170555, 10341110, 20682220]

約数ペア:

[(1, 20682220), (2, 10341110), (4, 5170555), (5, 4136444), (10, 2068222), (13, 1590940), (20, 1034111), (26, 795470), (29, 713180), (52, 397735), (58, 356590), (65, 318188), (116, 178295), (130, 159094), (145, 142636), (169, 122380), (211, 98020), (260, 79547), (290, 71318), (338, 61190), (377, 54860), (422, 49010), (580, 35659), (676, 30595), (754, 27430), (844, 24505), (845, 24476), (1055, 19604), (1508, 13715), (1690, 12238), (1885, 10972), (2110, 9802), (2743, 7540), (3380, 6119), (3770, 5486), (4220, 4901)]