21386818

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{4049}}^1$

素因数の和:4209

約数の個数: 16

約数和(自身を含む): 34020000

約数和(自身を除く): 12633182

約数列:

[1, 2, 19, 38, 139, 278, 2641, 4049, 5282, 8098, 76931, 153862, 562811, 1125622, 10693409, 21386818]

約数ペア:

[(1, 21386818), (2, 10693409), (19, 1125622), (38, 562811), (139, 153862), (278, 76931), (2641, 8098), (4049, 5282)]