21181744

素因数分解:

$2^4\times {\mathrm{103}}^1\times {\mathrm{12853}}^1$

素因数の和:12964

約数の個数: 20

約数和(自身を含む): 41441296

約数和(自身を除く): 20259552

約数列:

[1, 2, 4, 8, 16, 103, 206, 412, 824, 1648, 12853, 25706, 51412, 102824, 205648, 1323859, 2647718, 5295436, 10590872, 21181744]

約数ペア:

[(1, 21181744), (2, 10590872), (4, 5295436), (8, 2647718), (16, 1323859), (103, 205648), (206, 102824), (412, 51412), (824, 25706), (1648, 12853)]