18943865

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 25318656

約数和(自身を除く): 6374791

約数列:

[1, 5, 17, 43, 71, 73, 85, 215, 355, 365, 731, 1207, 1241, 3053, 3139, 3655, 5183, 6035, 6205, 15265, 15695, 25915, 51901, 53363, 88111, 222869, 259505, 266815, 440555, 1114345, 3788773, 18943865]

約数ペア:

[(1, 18943865), (5, 3788773), (17, 1114345), (43, 440555), (71, 266815), (73, 259505), (85, 222869), (215, 88111), (355, 53363), (365, 51901), (731, 25915), (1207, 15695), (1241, 15265), (3053, 6205), (3139, 6035), (3655, 5183)]