19914848

素因数分解:

$2^5\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{353}}^1$

素因数の和:447

約数の個数: 48

約数和(自身を含む): 41214096

約数和(自身を除く): 21299248

約数列:

[1, 2, 4, 8, 16, 32, 41, 43, 82, 86, 164, 172, 328, 344, 353, 656, 688, 706, 1312, 1376, 1412, 1763, 2824, 3526, 5648, 7052, 11296, 14104, 14473, 15179, 28208, 28946, 30358, 56416, 57892, 60716, 115784, 121432, 231568, 242864, 463136, 485728, 622339, 1244678, 2489356, 4978712, 9957424, 19914848]

約数ペア:

[(1, 19914848), (2, 9957424), (4, 4978712), (8, 2489356), (16, 1244678), (32, 622339), (41, 485728), (43, 463136), (82, 242864), (86, 231568), (164, 121432), (172, 115784), (328, 60716), (344, 57892), (353, 56416), (656, 30358), (688, 28946), (706, 28208), (1312, 15179), (1376, 14473), (1412, 14104), (1763, 11296), (2824, 7052), (3526, 5648)]