21371728

素因数分解:

$2^4\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1103}}^1$

素因数の和:1291

約数の個数: 40

約数和(自身を含む): 47639808

約数和(自身を除く): 26268080

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 173, 346, 692, 1103, 1211, 1384, 2206, 2422, 2768, 4412, 4844, 7721, 8824, 9688, 15442, 17648, 19376, 30884, 61768, 123536, 190819, 381638, 763276, 1335733, 1526552, 2671466, 3053104, 5342932, 10685864, 21371728]

約数ペア:

[(1, 21371728), (2, 10685864), (4, 5342932), (7, 3053104), (8, 2671466), (14, 1526552), (16, 1335733), (28, 763276), (56, 381638), (112, 190819), (173, 123536), (346, 61768), (692, 30884), (1103, 19376), (1211, 17648), (1384, 15442), (2206, 9688), (2422, 8824), (2768, 7721), (4412, 4844)]