21221745

素因数分解:

$3^1\times 5^1\times {\mathrm{911}}^1\times {\mathrm{1553}}^1$

素因数の和:2472

約数の個数: 16

約数和(自身を含む): 34013952

約数和(自身を除く): 12792207

約数列:

[1, 3, 5, 15, 911, 1553, 2733, 4555, 4659, 7765, 13665, 23295, 1414783, 4244349, 7073915, 21221745]

約数ペア:

[(1, 21221745), (3, 7073915), (5, 4244349), (15, 1414783), (911, 23295), (1553, 13665), (2733, 7765), (4555, 4659)]