21129856

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{349}}^1$

素因数の和:417

約数の個数: 64

約数和(自身を含む): 47124000

約数和(自身を除く): 25994144

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 43, 44, 64, 86, 88, 128, 172, 176, 344, 349, 352, 473, 688, 698, 704, 946, 1376, 1396, 1408, 1892, 2752, 2792, 3784, 3839, 5504, 5584, 7568, 7678, 11168, 15007, 15136, 15356, 22336, 30014, 30272, 30712, 44672, 60028, 60544, 61424, 120056, 122848, 165077, 240112, 245696, 330154, 480224, 491392, 660308, 960448, 1320616, 1920896, 2641232, 5282464, 10564928, 21129856]

約数ペア:

[(1, 21129856), (2, 10564928), (4, 5282464), (8, 2641232), (11, 1920896), (16, 1320616), (22, 960448), (32, 660308), (43, 491392), (44, 480224), (64, 330154), (86, 245696), (88, 240112), (128, 165077), (172, 122848), (176, 120056), (344, 61424), (349, 60544), (352, 60028), (473, 44672), (688, 30712), (698, 30272), (704, 30014), (946, 22336), (1376, 15356), (1396, 15136), (1408, 15007), (1892, 11168), (2752, 7678), (2792, 7568), (3784, 5584), (3839, 5504)]