21386871

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{479}}^1$

素因数の和:548

約数の個数: 36

約数和(自身を含む): 34856640

約数和(自身を除く): 13469769

約数列:

[1, 3, 9, 11, 33, 41, 99, 121, 123, 363, 369, 451, 479, 1089, 1353, 1437, 4059, 4311, 4961, 5269, 14883, 15807, 19639, 44649, 47421, 57959, 58917, 173877, 176751, 216029, 521631, 648087, 1944261, 2376319, 7128957, 21386871]

約数ペア:

[(1, 21386871), (3, 7128957), (9, 2376319), (11, 1944261), (33, 648087), (41, 521631), (99, 216029), (121, 176751), (123, 173877), (363, 58917), (369, 57959), (451, 47421), (479, 44649), (1089, 19639), (1353, 15807), (1437, 14883), (4059, 5269), (4311, 4961)]