21155871

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{877}}^1$

素因数の和:951

約数の個数: 32

約数和(自身を含む): 33378048

約数和(自身を除く): 12222177

約数列:

[1, 3, 11, 17, 33, 43, 51, 129, 187, 473, 561, 731, 877, 1419, 2193, 2631, 8041, 9647, 14909, 24123, 28941, 37711, 44727, 113133, 163999, 414821, 491997, 641087, 1244463, 1923261, 7051957, 21155871]

約数ペア:

[(1, 21155871), (3, 7051957), (11, 1923261), (17, 1244463), (33, 641087), (43, 491997), (51, 414821), (129, 163999), (187, 113133), (473, 44727), (561, 37711), (731, 28941), (877, 24123), (1419, 14909), (2193, 9647), (2631, 8041)]