19987456

素因数分解:

$2^{10}\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:300

約数の個数: 44

約数和(自身を含む): 40530600

約数和(自身を除く): 20543144

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 131, 149, 256, 262, 298, 512, 524, 596, 1024, 1048, 1192, 2096, 2384, 4192, 4768, 8384, 9536, 16768, 19072, 19519, 33536, 38144, 39038, 67072, 76288, 78076, 134144, 152576, 156152, 312304, 624608, 1249216, 2498432, 4996864, 9993728, 19987456]

約数ペア:

[(1, 19987456), (2, 9993728), (4, 4996864), (8, 2498432), (16, 1249216), (32, 624608), (64, 312304), (128, 156152), (131, 152576), (149, 134144), (256, 78076), (262, 76288), (298, 67072), (512, 39038), (524, 38144), (596, 33536), (1024, 19519), (1048, 19072), (1192, 16768), (2096, 9536), (2384, 8384), (4192, 4768)]