21752181

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 36796032

約数和(自身を除く): 15043851

約数列:

[1, 3, 9, 11, 23, 33, 41, 69, 99, 123, 207, 233, 253, 369, 451, 699, 759, 943, 1353, 2097, 2277, 2563, 2829, 4059, 5359, 7689, 8487, 9553, 10373, 16077, 23067, 28659, 31119, 48231, 58949, 85977, 93357, 105083, 176847, 219719, 315249, 530541, 659157, 945747, 1977471, 2416909, 7250727, 21752181]

約数ペア:

[(1, 21752181), (3, 7250727), (9, 2416909), (11, 1977471), (23, 945747), (33, 659157), (41, 530541), (69, 315249), (99, 219719), (123, 176847), (207, 105083), (233, 93357), (253, 85977), (369, 58949), (451, 48231), (699, 31119), (759, 28659), (943, 23067), (1353, 16077), (2097, 10373), (2277, 9553), (2563, 8487), (2829, 7689), (4059, 5359)]