19891456

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 44068640

約数和(自身を除く): 24177184

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 64, 86, 104, 128, 139, 172, 208, 256, 278, 344, 416, 556, 559, 688, 832, 1112, 1118, 1376, 1664, 1807, 2224, 2236, 2752, 3328, 3614, 4448, 4472, 5504, 5977, 7228, 8896, 8944, 11008, 11954, 14456, 17792, 17888, 23908, 28912, 35584, 35776, 47816, 57824, 71552, 77701, 95632, 115648, 143104, 155402, 191264, 231296, 310804, 382528, 462592, 621608, 765056, 1243216, 1530112, 2486432, 4972864, 9945728, 19891456]

約数ペア:

[(1, 19891456), (2, 9945728), (4, 4972864), (8, 2486432), (13, 1530112), (16, 1243216), (26, 765056), (32, 621608), (43, 462592), (52, 382528), (64, 310804), (86, 231296), (104, 191264), (128, 155402), (139, 143104), (172, 115648), (208, 95632), (256, 77701), (278, 71552), (344, 57824), (416, 47816), (556, 35776), (559, 35584), (688, 28912), (832, 23908), (1112, 17888), (1118, 17792), (1376, 14456), (1664, 11954), (1807, 11008), (2224, 8944), (2236, 8896), (2752, 7228), (3328, 5977), (3614, 5504), (4448, 4472)]