19995855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{479}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 16775985

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 121, 165, 253, 345, 363, 479, 605, 759, 1265, 1437, 1815, 2395, 2783, 3795, 5269, 7185, 8349, 11017, 13915, 15807, 26345, 33051, 41745, 55085, 57959, 79035, 121187, 165255, 173877, 289795, 363561, 605935, 869385, 1333057, 1817805, 3999171, 6665285, 19995855]

約数ペア:

[(1, 19995855), (3, 6665285), (5, 3999171), (11, 1817805), (15, 1333057), (23, 869385), (33, 605935), (55, 363561), (69, 289795), (115, 173877), (121, 165255), (165, 121187), (253, 79035), (345, 57959), (363, 55085), (479, 41745), (605, 33051), (759, 26345), (1265, 15807), (1437, 13915), (1815, 11017), (2395, 8349), (2783, 7185), (3795, 5269)]