21054904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{457}}^1$

素因数の和:919

約数の個数: 32

約数和(自身を含む): 42703920

約数和(自身を除く): 21649016

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 443, 457, 886, 914, 1772, 1828, 3544, 3656, 5759, 5941, 11518, 11882, 23036, 23764, 46072, 47528, 202451, 404902, 809804, 1619608, 2631863, 5263726, 10527452, 21054904]

約数ペア:

[(1, 21054904), (2, 10527452), (4, 5263726), (8, 2631863), (13, 1619608), (26, 809804), (52, 404902), (104, 202451), (443, 47528), (457, 46072), (886, 23764), (914, 23036), (1772, 11882), (1828, 11518), (3544, 5941), (3656, 5759)]