21708020

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4127}}^1$

素因数の和:4399

約数の個数: 24

約数和(自身を含む): 45771264

約数和(自身を除く): 24063244

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4127, 5260, 8254, 16508, 20635, 41270, 82540, 1085401, 2170802, 4341604, 5427005, 10854010, 21708020]

約数ペア:

[(1, 21708020), (2, 10854010), (4, 5427005), (5, 4341604), (10, 2170802), (20, 1085401), (263, 82540), (526, 41270), (1052, 20635), (1315, 16508), (2630, 8254), (4127, 5260)]