21306021

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{353}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 32624640

約数和(自身を除く): 11318619

約数列:

[1, 3, 11, 31, 33, 59, 93, 177, 341, 353, 649, 1023, 1059, 1829, 1947, 3883, 5487, 10943, 11649, 20119, 20827, 32829, 60357, 62481, 120373, 229097, 361119, 645637, 687291, 1936911, 7102007, 21306021]

約数ペア:

[(1, 21306021), (3, 7102007), (11, 1936911), (31, 687291), (33, 645637), (59, 361119), (93, 229097), (177, 120373), (341, 62481), (353, 60357), (649, 32829), (1023, 20827), (1059, 20119), (1829, 11649), (1947, 10943), (3883, 5487)]