209375815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1\times {\mathrm{397}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 282433536

約数和(自身を除く): 73057721

約数列:

[1, 5, 11, 43, 55, 215, 223, 397, 473, 1115, 1985, 2365, 2453, 4367, 9589, 12265, 17071, 21835, 47945, 85355, 88531, 105479, 187781, 442655, 527395, 938905, 973841, 3806833, 4869205, 19034165, 41875163, 209375815]

約数ペア:

[(1, 209375815), (5, 41875163), (11, 19034165), (43, 4869205), (55, 3806833), (215, 973841), (223, 938905), (397, 527395), (473, 442655), (1115, 187781), (1985, 105479), (2365, 88531), (2453, 85355), (4367, 47945), (9589, 21835), (12265, 17071)]