21555784

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{193}}^1\times {\mathrm{607}}^1$

素因数の和:829

約数の個数: 32

約数和(自身を含む): 42462720

約数和(自身を除く): 20906936

約数列:

[1, 2, 4, 8, 23, 46, 92, 184, 193, 386, 607, 772, 1214, 1544, 2428, 4439, 4856, 8878, 13961, 17756, 27922, 35512, 55844, 111688, 117151, 234302, 468604, 937208, 2694473, 5388946, 10777892, 21555784]

約数ペア:

[(1, 21555784), (2, 10777892), (4, 5388946), (8, 2694473), (23, 937208), (46, 468604), (92, 234302), (184, 117151), (193, 111688), (386, 55844), (607, 35512), (772, 27922), (1214, 17756), (1544, 13961), (2428, 8878), (4439, 4856)]