18511280

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 45532800

約数和(自身を除く): 27021520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 79, 80, 101, 116, 145, 158, 202, 232, 290, 316, 395, 404, 464, 505, 580, 632, 790, 808, 1010, 1160, 1264, 1580, 1616, 2020, 2291, 2320, 2929, 3160, 4040, 4582, 5858, 6320, 7979, 8080, 9164, 11455, 11716, 14645, 15958, 18328, 22910, 23432, 29290, 31916, 36656, 39895, 45820, 46864, 58580, 63832, 79790, 91640, 117160, 127664, 159580, 183280, 231391, 234320, 319160, 462782, 638320, 925564, 1156955, 1851128, 2313910, 3702256, 4627820, 9255640, 18511280]

約数ペア:

[(1, 18511280), (2, 9255640), (4, 4627820), (5, 3702256), (8, 2313910), (10, 1851128), (16, 1156955), (20, 925564), (29, 638320), (40, 462782), (58, 319160), (79, 234320), (80, 231391), (101, 183280), (116, 159580), (145, 127664), (158, 117160), (202, 91640), (232, 79790), (290, 63832), (316, 58580), (395, 46864), (404, 45820), (464, 39895), (505, 36656), (580, 31916), (632, 29290), (790, 23432), (808, 22910), (1010, 18328), (1160, 15958), (1264, 14645), (1580, 11716), (1616, 11455), (2020, 9164), (2291, 8080), (2320, 7979), (2929, 6320), (3160, 5858), (4040, 4582)]