18990968

素因数分解:

$2^3\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{199}}^1$

素因数の和:435

約数の個数: 32

約数和(自身を含む): 36480000

約数和(自身を除く): 17489032

約数列:

[1, 2, 4, 8, 79, 151, 158, 199, 302, 316, 398, 604, 632, 796, 1208, 1592, 11929, 15721, 23858, 30049, 31442, 47716, 60098, 62884, 95432, 120196, 125768, 240392, 2373871, 4747742, 9495484, 18990968]

約数ペア:

[(1, 18990968), (2, 9495484), (4, 4747742), (8, 2373871), (79, 240392), (151, 125768), (158, 120196), (199, 95432), (302, 62884), (316, 60098), (398, 47716), (604, 31442), (632, 30049), (796, 23858), (1208, 15721), (1592, 11929)]