21027405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{8707}}^1$

素因数の和:8745

約数の個数: 32

約数和(自身を含む): 40126464

約数和(自身を除く): 19099059

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 69, 105, 115, 161, 345, 483, 805, 2415, 8707, 26121, 43535, 60949, 130605, 182847, 200261, 304745, 600783, 914235, 1001305, 1401827, 3003915, 4205481, 7009135, 21027405]

約数ペア:

[(1, 21027405), (3, 7009135), (5, 4205481), (7, 3003915), (15, 1401827), (21, 1001305), (23, 914235), (35, 600783), (69, 304745), (105, 200261), (115, 182847), (161, 130605), (345, 60949), (483, 43535), (805, 26121), (2415, 8707)]