21457856

素因数分解:

$2^6\times 7^1\times {\mathrm{211}}^1\times {\mathrm{227}}^1$

素因数の和:457

約数の個数: 56

約数和(自身を含む): 49109376

約数和(自身を除く): 27651520

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 211, 224, 227, 422, 448, 454, 844, 908, 1477, 1589, 1688, 1816, 2954, 3178, 3376, 3632, 5908, 6356, 6752, 7264, 11816, 12712, 13504, 14528, 23632, 25424, 47264, 47897, 50848, 94528, 95794, 101696, 191588, 335279, 383176, 670558, 766352, 1341116, 1532704, 2682232, 3065408, 5364464, 10728928, 21457856]

約数ペア:

[(1, 21457856), (2, 10728928), (4, 5364464), (7, 3065408), (8, 2682232), (14, 1532704), (16, 1341116), (28, 766352), (32, 670558), (56, 383176), (64, 335279), (112, 191588), (211, 101696), (224, 95794), (227, 94528), (422, 50848), (448, 47897), (454, 47264), (844, 25424), (908, 23632), (1477, 14528), (1589, 13504), (1688, 12712), (1816, 11816), (2954, 7264), (3178, 6752), (3376, 6356), (3632, 5908)]