21187071

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{5387}}^1$

素因数の和:5435

約数の個数: 24

約数和(自身を含む): 33621120

約数和(自身を除く): 12434049

約数列:

[1, 3, 9, 19, 23, 57, 69, 171, 207, 437, 1311, 3933, 5387, 16161, 48483, 102353, 123901, 307059, 371703, 921177, 1115109, 2354119, 7062357, 21187071]

約数ペア:

[(1, 21187071), (3, 7062357), (9, 2354119), (19, 1115109), (23, 921177), (57, 371703), (69, 307059), (171, 123901), (207, 102353), (437, 48483), (1311, 16161), (3933, 5387)]