21806212

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{457}}^1$

素因数の和:691

約数の個数: 24

約数和(自身を含む): 38984960

約数和(自身を除く): 17178748

約数列:

[1, 2, 4, 79, 151, 158, 302, 316, 457, 604, 914, 1828, 11929, 23858, 36103, 47716, 69007, 72206, 138014, 144412, 276028, 5451553, 10903106, 21806212]

約数ペア:

[(1, 21806212), (2, 10903106), (4, 5451553), (79, 276028), (151, 144412), (158, 138014), (302, 72206), (316, 69007), (457, 47716), (604, 36103), (914, 23858), (1828, 11929)]