20265728

素因数分解:

$2^8\times 7^1\times {\mathrm{43}}^1\times {\mathrm{263}}^1$

素因数の和:329

約数の個数: 72

約数和(自身を含む): 47486208

約数和(自身を除く): 27220480

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 56, 64, 86, 112, 128, 172, 224, 256, 263, 301, 344, 448, 526, 602, 688, 896, 1052, 1204, 1376, 1792, 1841, 2104, 2408, 2752, 3682, 4208, 4816, 5504, 7364, 8416, 9632, 11008, 11309, 14728, 16832, 19264, 22618, 29456, 33664, 38528, 45236, 58912, 67328, 77056, 79163, 90472, 117824, 158326, 180944, 235648, 316652, 361888, 471296, 633304, 723776, 1266608, 1447552, 2533216, 2895104, 5066432, 10132864, 20265728]

約数ペア:

[(1, 20265728), (2, 10132864), (4, 5066432), (7, 2895104), (8, 2533216), (14, 1447552), (16, 1266608), (28, 723776), (32, 633304), (43, 471296), (56, 361888), (64, 316652), (86, 235648), (112, 180944), (128, 158326), (172, 117824), (224, 90472), (256, 79163), (263, 77056), (301, 67328), (344, 58912), (448, 45236), (526, 38528), (602, 33664), (688, 29456), (896, 22618), (1052, 19264), (1204, 16832), (1376, 14728), (1792, 11309), (1841, 11008), (2104, 9632), (2408, 8416), (2752, 7364), (3682, 5504), (4208, 4816)]