21691264

素因数分解:

$2^7\times 7^1\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:627

約数の個数: 64

約数和(自身を含む): 50624640

約数和(自身を除く): 28933376

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 56, 64, 86, 112, 128, 172, 224, 301, 344, 448, 563, 602, 688, 896, 1126, 1204, 1376, 2252, 2408, 2752, 3941, 4504, 4816, 5504, 7882, 9008, 9632, 15764, 18016, 19264, 24209, 31528, 36032, 38528, 48418, 63056, 72064, 96836, 126112, 169463, 193672, 252224, 338926, 387344, 504448, 677852, 774688, 1355704, 1549376, 2711408, 3098752, 5422816, 10845632, 21691264]

約数ペア:

[(1, 21691264), (2, 10845632), (4, 5422816), (7, 3098752), (8, 2711408), (14, 1549376), (16, 1355704), (28, 774688), (32, 677852), (43, 504448), (56, 387344), (64, 338926), (86, 252224), (112, 193672), (128, 169463), (172, 126112), (224, 96836), (301, 72064), (344, 63056), (448, 48418), (563, 38528), (602, 36032), (688, 31528), (896, 24209), (1126, 19264), (1204, 18016), (1376, 15764), (2252, 9632), (2408, 9008), (2752, 7882), (3941, 5504), (4504, 4816)]