21509345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{449}}^1$

素因数の和:545

約数の個数: 32

約数和(自身を含む): 30844800

約数和(自身を除く): 9335455

約数列:

[1, 5, 11, 13, 55, 65, 67, 143, 335, 449, 715, 737, 871, 2245, 3685, 4355, 4939, 5837, 9581, 24695, 29185, 30083, 47905, 64207, 150415, 321035, 330913, 391079, 1654565, 1955395, 4301869, 21509345]

約数ペア:

[(1, 21509345), (5, 4301869), (11, 1955395), (13, 1654565), (55, 391079), (65, 330913), (67, 321035), (143, 150415), (335, 64207), (449, 47905), (715, 30083), (737, 29185), (871, 24695), (2245, 9581), (3685, 5837), (4355, 4939)]