20462391920

素因数分解:

$2^4\times 5^1\times {\mathrm{379}}^1\times {\mathrm{661}}^1\times {\mathrm{1021}}^1$

素因数の和:2074

約数の個数: 80

約数和(自身を含む): 47819543520

約数和(自身を除く): 27357151600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 379, 661, 758, 1021, 1322, 1516, 1895, 2042, 2644, 3032, 3305, 3790, 4084, 5105, 5288, 6064, 6610, 7580, 8168, 10210, 10576, 13220, 15160, 16336, 20420, 26440, 30320, 40840, 52880, 81680, 250519, 386959, 501038, 674881, 773918, 1002076, 1252595, 1349762, 1547836, 1934795, 2004152, 2505190, 2699524, 3095672, 3374405, 3869590, 4008304, 5010380, 5399048, 6191344, 6748810, 7739180, 10020760, 10798096, 13497620, 15478360, 20041520, 26995240, 30956720, 53990480, 255779899, 511559798, 1023119596, 1278899495, 2046239192, 2557798990, 4092478384, 5115597980, 10231195960, 20462391920]

約数ペア:

[(1, 20462391920), (2, 10231195960), (4, 5115597980), (5, 4092478384), (8, 2557798990), (10, 2046239192), (16, 1278899495), (20, 1023119596), (40, 511559798), (80, 255779899), (379, 53990480), (661, 30956720), (758, 26995240), (1021, 20041520), (1322, 15478360), (1516, 13497620), (1895, 10798096), (2042, 10020760), (2644, 7739180), (3032, 6748810), (3305, 6191344), (3790, 5399048), (4084, 5010380), (5105, 4008304), (5288, 3869590), (6064, 3374405), (6610, 3095672), (7580, 2699524), (8168, 2505190), (10210, 2004152), (10576, 1934795), (13220, 1547836), (15160, 1349762), (16336, 1252595), (20420, 1002076), (26440, 773918), (30320, 674881), (40840, 501038), (52880, 386959), (81680, 250519)]