21780044

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:171

約数の個数: 72

約数和(自身を含む): 47038320

約数和(自身を除く): 25258276

約数列:

[1, 2, 4, 11, 13, 22, 26, 29, 44, 52, 58, 101, 116, 143, 169, 202, 286, 319, 338, 377, 404, 572, 638, 676, 754, 1111, 1276, 1313, 1508, 1859, 2222, 2626, 2929, 3718, 4147, 4444, 4901, 5252, 5858, 7436, 8294, 9802, 11716, 14443, 16588, 17069, 19604, 28886, 32219, 34138, 38077, 53911, 57772, 64438, 68276, 76154, 107822, 128876, 152308, 187759, 215644, 375518, 418847, 495001, 751036, 837694, 990002, 1675388, 1980004, 5445011, 10890022, 21780044]

約数ペア:

[(1, 21780044), (2, 10890022), (4, 5445011), (11, 1980004), (13, 1675388), (22, 990002), (26, 837694), (29, 751036), (44, 495001), (52, 418847), (58, 375518), (101, 215644), (116, 187759), (143, 152308), (169, 128876), (202, 107822), (286, 76154), (319, 68276), (338, 64438), (377, 57772), (404, 53911), (572, 38077), (638, 34138), (676, 32219), (754, 28886), (1111, 19604), (1276, 17069), (1313, 16588), (1508, 14443), (1859, 11716), (2222, 9802), (2626, 8294), (2929, 7436), (3718, 5858), (4147, 5252), (4444, 4901)]