21091876

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{761}}^1$

素因数の和:832

約数の個数: 36

約数和(自身を含む): 40997124

約数和(自身を除く): 19905248

約数列:

[1, 2, 4, 13, 26, 41, 52, 82, 164, 169, 338, 533, 676, 761, 1066, 1522, 2132, 3044, 6929, 9893, 13858, 19786, 27716, 31201, 39572, 62402, 124804, 128609, 257218, 405613, 514436, 811226, 1622452, 5272969, 10545938, 21091876]

約数ペア:

[(1, 21091876), (2, 10545938), (4, 5272969), (13, 1622452), (26, 811226), (41, 514436), (52, 405613), (82, 257218), (164, 128609), (169, 124804), (338, 62402), (533, 39572), (676, 31201), (761, 27716), (1066, 19786), (1522, 13858), (2132, 9893), (3044, 6929)]