21997195

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{103}}^1\times {\mathrm{353}}^1$

素因数の和:483

約数の個数: 24

約数和(自身を含む): 29379168

約数和(自身を除く): 7381973

約数列:

[1, 5, 11, 55, 103, 121, 353, 515, 605, 1133, 1765, 3883, 5665, 12463, 19415, 36359, 42713, 62315, 181795, 213565, 399949, 1999745, 4399439, 21997195]

約数ペア:

[(1, 21997195), (5, 4399439), (11, 1999745), (55, 399949), (103, 213565), (121, 181795), (353, 62315), (515, 42713), (605, 36359), (1133, 19415), (1765, 12463), (3883, 5665)]