21755168

素因数分解:

$2^5\times {\mathrm{67}}^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 44382240

約数和(自身を除く): 22627072

約数列:

[1, 2, 4, 8, 16, 32, 67, 73, 134, 139, 146, 268, 278, 292, 536, 556, 584, 1072, 1112, 1168, 2144, 2224, 2336, 4448, 4891, 9313, 9782, 10147, 18626, 19564, 20294, 37252, 39128, 40588, 74504, 78256, 81176, 149008, 156512, 162352, 298016, 324704, 679849, 1359698, 2719396, 5438792, 10877584, 21755168]

約数ペア:

[(1, 21755168), (2, 10877584), (4, 5438792), (8, 2719396), (16, 1359698), (32, 679849), (67, 324704), (73, 298016), (134, 162352), (139, 156512), (146, 149008), (268, 81176), (278, 78256), (292, 74504), (536, 40588), (556, 39128), (584, 37252), (1072, 20294), (1112, 19564), (1168, 18626), (2144, 10147), (2224, 9782), (2336, 9313), (4448, 4891)]