18727775

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:224

約数の個数: 36

約数和(自身を含む): 26321232

約数和(自身を除く): 7593457

約数列:

[1, 5, 11, 25, 41, 55, 121, 151, 205, 275, 451, 605, 755, 1025, 1661, 2255, 3025, 3775, 4961, 6191, 8305, 11275, 18271, 24805, 30955, 41525, 68101, 91355, 124025, 154775, 340505, 456775, 749111, 1702525, 3745555, 18727775]

約数ペア:

[(1, 18727775), (5, 3745555), (11, 1702525), (25, 749111), (41, 456775), (55, 340505), (121, 154775), (151, 124025), (205, 91355), (275, 68101), (451, 41525), (605, 30955), (755, 24805), (1025, 18271), (1661, 11275), (2255, 8305), (3025, 6191), (3775, 4961)]