21357728

素因数分解:

$2^5\times 7^2\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:334

約数の個数: 72

約数和(自身を含む): 50029812

約数和(自身を除く): 28672084

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 53, 56, 98, 106, 112, 196, 212, 224, 257, 371, 392, 424, 514, 742, 784, 848, 1028, 1484, 1568, 1696, 1799, 2056, 2597, 2968, 3598, 4112, 5194, 5936, 7196, 8224, 10388, 11872, 12593, 13621, 14392, 20776, 25186, 27242, 28784, 41552, 50372, 54484, 57568, 83104, 95347, 100744, 108968, 190694, 201488, 217936, 381388, 402976, 435872, 667429, 762776, 1334858, 1525552, 2669716, 3051104, 5339432, 10678864, 21357728]

約数ペア:

[(1, 21357728), (2, 10678864), (4, 5339432), (7, 3051104), (8, 2669716), (14, 1525552), (16, 1334858), (28, 762776), (32, 667429), (49, 435872), (53, 402976), (56, 381388), (98, 217936), (106, 201488), (112, 190694), (196, 108968), (212, 100744), (224, 95347), (257, 83104), (371, 57568), (392, 54484), (424, 50372), (514, 41552), (742, 28784), (784, 27242), (848, 25186), (1028, 20776), (1484, 14392), (1568, 13621), (1696, 12593), (1799, 11872), (2056, 10388), (2597, 8224), (2968, 7196), (3598, 5936), (4112, 5194)]