18974252

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{197}}^1\times {\mathrm{199}}^1$

素因数の和:422

約数の個数: 36

約数和(自身を含む): 36867600

約数和(自身を除く): 17893348

約数列:

[1, 2, 4, 11, 22, 44, 121, 197, 199, 242, 394, 398, 484, 788, 796, 2167, 2189, 4334, 4378, 8668, 8756, 23837, 24079, 39203, 47674, 48158, 78406, 95348, 96316, 156812, 431233, 862466, 1724932, 4743563, 9487126, 18974252]

約数ペア:

[(1, 18974252), (2, 9487126), (4, 4743563), (11, 1724932), (22, 862466), (44, 431233), (121, 156812), (197, 96316), (199, 95348), (242, 78406), (394, 48158), (398, 47674), (484, 39203), (788, 24079), (796, 23837), (2167, 8756), (2189, 8668), (4334, 4378)]