20004380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1151}}^1$

素因数の和:1250

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 26444260

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 110, 158, 220, 316, 395, 790, 869, 1151, 1580, 1738, 2302, 3476, 4345, 4604, 5755, 8690, 11510, 12661, 17380, 23020, 25322, 50644, 63305, 90929, 126610, 181858, 253220, 363716, 454645, 909290, 1000219, 1818580, 2000438, 4000876, 5001095, 10002190, 20004380]

約数ペア:

[(1, 20004380), (2, 10002190), (4, 5001095), (5, 4000876), (10, 2000438), (11, 1818580), (20, 1000219), (22, 909290), (44, 454645), (55, 363716), (79, 253220), (110, 181858), (158, 126610), (220, 90929), (316, 63305), (395, 50644), (790, 25322), (869, 23020), (1151, 17380), (1580, 12661), (1738, 11510), (2302, 8690), (3476, 5755), (4345, 4604)]