21538168

素因数分解:

$2^3\times {\mathrm{83}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:451

約数の個数: 32

約数和(自身を含む): 41328000

約数和(自身を除く): 19789832

約数列:

[1, 2, 4, 8, 83, 163, 166, 199, 326, 332, 398, 652, 664, 796, 1304, 1592, 13529, 16517, 27058, 32437, 33034, 54116, 64874, 66068, 108232, 129748, 132136, 259496, 2692271, 5384542, 10769084, 21538168]

約数ペア:

[(1, 21538168), (2, 10769084), (4, 5384542), (8, 2692271), (83, 259496), (163, 132136), (166, 129748), (199, 108232), (326, 66068), (332, 64874), (398, 54116), (652, 33034), (664, 32437), (796, 27058), (1304, 16517), (1592, 13529)]