20181488

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{317}}^1$

素因数の和:521

約数の個数: 40

約数和(自身を含む): 41167008

約数和(自身を除く): 20985520

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 173, 184, 317, 346, 368, 634, 692, 1268, 1384, 2536, 2768, 3979, 5072, 7291, 7958, 14582, 15916, 29164, 31832, 54841, 58328, 63664, 109682, 116656, 219364, 438728, 877456, 1261343, 2522686, 5045372, 10090744, 20181488]

約数ペア:

[(1, 20181488), (2, 10090744), (4, 5045372), (8, 2522686), (16, 1261343), (23, 877456), (46, 438728), (92, 219364), (173, 116656), (184, 109682), (317, 63664), (346, 58328), (368, 54841), (634, 31832), (692, 29164), (1268, 15916), (1384, 14582), (2536, 7958), (2768, 7291), (3979, 5072)]